Fixed the failing tests in BossTitleTests.cs. All tests now pass.
Tidying up the logic in BuildPluralVerb. Some branches still need unit tests.
Moved TODO from BossTitleTests to GeneratorTests.cs.
Added more plural tests.
Added unit test for "ch" ending. Tidied up BuildPluralVerbTests.cs. Started tidy up of BuildPluralVerb method as it's quite messy right now.
Tidied up BuildPluralVerb. Much better now.