• add isruleset function
• add optional import option, causing less to not fail if file not found
• Fix browsers-side cache.
• Many fixes to import reference - support @support and keyframe
• Selectors now interpolate pseudo selectors (e.g. :@{hover})
• Fix comments missed off if they were at the end of the file
• Fix !important used with parametric mixins
• Emits warnings for extends when the target is not found
• include-path now works on data-uri
• variables and function calls work for path in data-uri
• Fix absolute paths not working on imports sometimes.
• Unicode BOM removed again
• Misc. bug fixes