Merge pull request #31 from dr-nick/master

Fix for #29
Updates Rhino to 1.7R4.
Make resource loading strategy pluggable, decompose default loading
behaviour into separate components.
Allow passing of file location along with extracted stylesheet block, so
that include paths relative to source file location may be resolved.
Unification of compileFile and compileString by moving source loading to
Java side.
Added back rudimentary HTTP loader support.
Merge pull request #32 from rkrzewski/pluggable_loaders

Templating engine support - pluggable resource loading & resolution of includes in embedded styleshets
Updates less.js to 1.3.1
Fix file system resource loader cannot load files on a Windows OS bug.
Merge pull request #36 from apound/master

Fixed file system resource loader cannot load files from a Windows OS
Updates the version to 1.3.3
Updates plugin versions
[maven-release-plugin] prepare release lesscss-engine-1.3.3
[maven-release-plugin] prepare for next development iteration
Adds fixed plugin versions
Merge remote-tracking branch 'upstream/master'