Rogue Legacy v1.0.13

Major Changes:
- Implemented some non-trivial optimizations to increase game performance.
(Smarter sprite batching)
(Merged several spritesheets to reduce texture swapping)
(Additional minor tweaks to reduce GPU load).
- Fixed bug where corrupt backup saves would get players into endless save corruption loops.
- Forced flushing to OS stream for backup files to (hopefully) reduce the chances of a backup save corrupting.

General fixes:
- Fixed bug where gold would very rarely go into the negatives, resulting in a crash.
- Removed normal mapping effects from the content pipeline.
- Fixed bug where you could exit the axe carnival room, resulting in odd game behaviour.
- Fixed bug where you could talk to shop keeps and architect while in mid-dash, resulting in a crash.
- Fixed bug where beating the last boss would zero out your traits.
- Fixed bug where money bags were not animating properly upon landing.
- Fixed bug where beating the game with the compass item would result in a crash when starting a new game.