KotC 1.6 Update

Just some small adjustments based on some feedback from the last couple months:

• Added an indication when the game autosaves at the end of a chapter.
• Fixed a few hidden button issues that may have caused unexpected jumping back to previous chapters.
• Changed one of the end of game feedback messages to more accurately reflect positive player progress.

PC, Mac and Linux builds have been updated, but the android build will need a separate update to fix issues that specifically hit different screen ratios.