Initial implementation of mixin guard `default` function (aka "mutually exclusive guards")
mixin guard `default`: `default` moved to functions.js + other minor improvements
Experimental support for "property name interpolation".
Experimental support for "property name interpolation", part-2.
Merge branch 'property-name-interp' of https://github.com/seven-phases-max/less.js
Merge branch 'mutually-exclusive-guards' of https://github.com/seven-phases-max/less.js
add to the changelog