Solving js interpolation for #22. It is as general as possible, to allow
different languages support.
Renamed files #22
Another clean up #22
Yet another #22
Refactoring related to #22. Created new ast node ListExpression which
corresponds to comma or space separated lists. ComposedExpression will now
be used only for binary expressions.
Renamed composed expression to binary expression. #22
minor changes
[maven-release-plugin] prepare release less4j-1.5.2
[maven-release-plugin] prepare for next development iteration
Added support for variables in keyframes and charsets #191