Code formatting applied to most files

[Avery-Dunn]

Inspired by #416 and #410, I applied IntelliJ's default code formatting to all files, and most received at least some small change.

The majority of the changes are simple whitespace fixes : adding/removing spaces, newlines, tabs, etc. There were a couple actual code changes, but it was just replacing the hardcoded string "UTF-8" with the value from Java's StandardCharsets file (see AccountTest for an example), and simplifying a couple of if statements (see InteractionRequiredCache)

[cbismuth]

Would be great to make this configuration local to your IntelliJ project and then commit a subset of configuration files, so that code style would be consistent across contributors using IntelliJ.

To do so create a .gitignore file in your .idea/ directory and add these lines:

*

!.gitignore

!codeStyles/
!codeStyles/*.xml

!inspectionProfiles/
!inspectionProfiles/*.xml

!runConfigurations/
!runConfigurations/*.xml

Here is a sample project.