Update .gitignore

- Add ignore rules for common compressions used for backed up data
  during development
- Ignore Python's cache
- Ignore pyenv definition
- Ignore Visual Studio Code's project settings

.gitignore

@@ -13,4 +13,9 @@ _site
 /*.map
 /work
 analytics.private
-node_modules
+node_modules
+__pycache__
+.vscode
+.python-version
+*.zip
+*.gz