Execute LessCSS from java

-Lib used and tested with is Rhino 1.7R4
-Lightly modified lessc-rhino-x.js to add support for -varin -varout arguments (see my modified rhino.js)
-Just drop the less-rhino & lessc-rhino files into the /META-INF folder, this code uses 1.7.5 but just update source to support next version and replace files
-I use this to compile/merge/etc LessCSS in my java webapp context listener contextInitialized() so speed does not matter