New tiles

Added some new tiles to the tile sheet
- Alternative grass tiles
- More road tiles that can be used so they don't look off-center
- Some fences, the top row, stone, is entirely facedown, while the
second row has a side view
- Added a bridge with a two tile wide walkway for going over water
Merge branch 'master' of https://github.com/Shtevay/JavaJesus