Update the supported version of IE to be 8+
Update the supported version of IE in examples page too.
Update site for ver. 0.2.3

Fixes #34, #37, #39, #43, #46, #47, #48, #49, #51, #59, #60
Fix browser support info in the example page
Replace add and style images with the new skin
Various style fixes
Update styles image dimensions
Update AlloyEditor to ver 0.2.5