Update .gitignore
Add some optimizations

Conflicts:
	src/DelegateDecompiler.EfTests/GeneratedDocumentation/DetailedListOfSupportedCommands.md
	src/DelegateDecompiler.EfTests/GeneratedDocumentation/DetailedListOfSupportedCommandsWithSQL.md
	src/DelegateDecompiler.EfTests/GeneratedDocumentation/SummaryOfSupportedCommands.md
Merge branch 'gh-31'
Switch to NUnit
Fix nullable operations #28
Set version 0.12.0
Update nuget
Remove remaining xunit references
Build EF package
Update README.md
Update README.md