Updated README
Update README.md
Support for base64 and csv encoded .tmx files
Tilemap parser updated for right-handed coordinates
Removed unnecessary optional binding in tmx parser
Fixed a consistency issue in LGTile
Merge pull request #15 from thelukester92/master

Pull master changes to tmx-support
Merge pull request #17 from thelukester92/master

Minor bug fixes.
Implemented tmx support with complete tile flipping.
Merge tmx-support branch into master