housekeeping: update the git ignore file.

.gitignore

@@ -1,7 +1,10 @@
 ## Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
 
 # User-specific files
+*.rsuser
 *.suo
 *.user
 *.userosscache
@@ -10,50 +13,67 @@
 # User-specific files (MonoDevelop/Xamarin Studio)
 *.userprefs
 
+# Mono auto generated files
+mono_crash.*
+
 # Build results
 [Dd]ebug/
 [Dd]ebugPublic/
 [Rr]elease/
 [Rr]eleases/
 x64/
 x86/
-build/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
 bld/
 [Bb]in/
 [Oo]bj/
+[Ll]og/
 
-# Visual Studio 2015 cache/options directory
+# Visual Studio 2015/2017 cache/options directory
 .vs/
 # Uncomment if you have tasks that create the project's static files in wwwroot
 #wwwroot/
 
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
 # MSTest test Results
 [Tt]est[Rr]esult*/
 [Bb]uild[Ll]og.*
 
 # NUNIT
 *.VisualState.xml
 TestResult.xml
+nunit-*.xml
 
 # Build Results of an ATL Project
 [Dd]ebugPS/
 [Rr]eleasePS/
 dlldata.c
 
-# DNX
-*.lock.json
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
 artifacts/
-*.nuget.props
-*.nuget.targets
 
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
 *_i.c
 *_p.c
-*_i.h
+*_h.h
 *.ilk
 *.meta
 *.obj
+*.iobj
 *.pch
 *.pdb
+*.ipdb
 *.pgc
 *.pgd
 *.rsp
@@ -63,14 +83,14 @@ artifacts/
 *.tlh
 *.tmp
 *.tmp_proj
+*_wpftmp.csproj
 *.log
 *.vspscc
 *.vssscc
 .builds
 *.pidb
 *.svclog
 *.scc
-*.binlog
 
 # Chutzpah Test files
 _Chutzpah*
@@ -83,13 +103,18 @@ ipch/
 *.opensdf
 *.sdf
 *.cachefile
+*.VC.db
+*.VC.VC.opendb
 
 # Visual Studio profiler
 *.psess
 *.vsp
 *.vspx
 *.sap
 
+# Visual Studio Trace Files
+*.e2e
+
 # TFS 2012 Local Workspace
 $tf/
 
@@ -110,6 +135,14 @@ _TeamCity*
 # DotCover is a Code Coverage Tool
 *.dotCover
 
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
 # NCrunch
 _NCrunch_*
 .*crunch*.local.xml
@@ -141,49 +174,72 @@ publish/
 # Publish Web Output
 *.[Pp]ublish.xml
 *.azurePubxml
-# TODO: Comment the next line if you want to checkin your web deploy settings
+# Note: Comment the next line if you want to checkin your web deploy settings,
 # but database connection strings (with potential passwords) will be unencrypted
 *.pubxml
 *.publishproj
 
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
 # NuGet Packages
 *.nupkg
+# NuGet Symbol Packages
+*.snupkg
 # The packages folder can be ignored because of Package Restore
-**/packages/*
+**/[Pp]ackages/*
 # except build/, which is used as an MSBuild target.
-!**/packages/build/
+!**/[Pp]ackages/build/
 # Uncomment if necessary however generally it will be regenerated when needed
-#!**/packages/repositories.config
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
 
-# Windows Azure Build Output
+# Microsoft Azure Build Output
 csx/
 *.build.csdef
 
-# Windows Azure Emulator
+# Microsoft Azure Emulator
 ecf/
 rcf/
 
-# Windows Store app package directory
+# Windows Store app package directories and files
 AppPackages/
 BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
 
 # Visual Studio cache files
 # files ending in .cache can be ignored
 *.[Cc]ache
 # but keep track of directories ending in .cache
-!*.[Cc]ache/
+!?*.[Cc]ache/
 
 # Others
 ClientBin/
 ~$*
 *~
 *.dbmdl
 *.dbproj.schemaview
+*.jfm
 *.pfx
 *.publishsettings
-node_modules/
 orleans.codegen.cs
 
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
 # RIA/Silverlight projects
 Generated_Code/
 
@@ -194,15 +250,22 @@ _UpgradeReport_Files/
 Backup*/
 UpgradeLog*.XML
 UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
 
 # SQL Server files
 *.mdf
 *.ldf
+*.ndf
 
 # Business Intelligence projects
 *.rdl.data
 *.bim.layout
 *.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
 
 # Microsoft Fakes
 FakesAssemblies/
@@ -212,13 +275,17 @@ FakesAssemblies/
 
 # Node.js Tools for Visual Studio
 .ntvs_analysis.dat
+node_modules/
 
 # Visual Studio 6 build log
 *.plg
 
 # Visual Studio 6 workspace options file
 *.opt
 
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
 # Visual Studio LightSwitch build output
 **/*.HTMLClient/GeneratedArtifacts
 **/*.DesktopClient/GeneratedArtifacts
@@ -229,12 +296,57 @@ _Pvt_Extensions
 
 # Paket dependency manager
 .paket/paket.exe
+paket-files/
 
 # FAKE - F# Make
 .fake/
 
-# Tools
-tools/
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+tools/**
+!tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
 
 # ReactiveUI
 artifacts/
@@ -243,11 +355,11 @@ src/ReactiveUI.Events*/Events_*.cs
 # macOS
 .DS_Store
 
-src/*.Tests/API/*.received.txt
+# Jetbrains
 .idea/
 
+# API Approval
+src/*.Tests/API/*.received.txt
+
 # Fody Weavers (for tests)
 src/Tools/
-
-# Local packages (for testing only)
-LocalPackages/