Merge pull request #8 from anthonymoralez/master

Make isometric a front-end js library with bower.
Updated to include Anthony
Added samples repo to readme
Setting default bower install directory
Added default directory
Update bower.json
Added ability to render rgba values rather than tile IDs
Added function to make it easier to rotate two dimensional arrays
Fixed rgba drawing for when no height map is applied
Fixed centering for non isometric layouts
Fixed layer and shadow math after fixing width/height reversed bug
Fixed silly bug with loading status var scope
Reverted code and fixed bug at source
Fixed check for heightmap