Resized textures to powers of 2, as required by OpenGL
Checkpoint of work towards OpenGL support

Now able to draw the tiles, pan, and zoom
Draw background gradient
Fixed trader coordinates
Removed useless hash function calls in TextureManager
Nicer texture blending
Draw hexagons in one function
Bring hexagons closer together
Check the right object in null test
Fixed accidentally deleted code (loads green and blue settlements)
Move hexagons apart slightly so they overlap nicely
Fixed drawing order so robber texture is blended properly
Renamed Geometry.getTraderIconOffsetX/Y to getTraderIconX/Y
Removed old commented out version of Square.render()
Edited README for opengl branch
Adjusted zoom levels
Android api 14 and later only
Removed resume button from game menu
Stats menu
Game menu