Less4j version upgraded to latest release (1.2.1), fixes bootstrap
incompatibility.
Merge pull request #276 from captSL/bootstrap3

Less4j version upgraded to latest release (1.2.1)
Merge pull request #275 from tahitiangabriel/bootstrap3

Bootstrap3 : IconType refactor
Fix references to GlyphIconType
Fixes #272 - Use 'P' as constraint type that links can point to page. Use 'T' as the type of the model object of the link
Cleanup Bootswatch themes:
-remove : spruce and superhere (do not exist anymore!)
-update : amelia (to 3.02)
-add : flatly