Compass filter: added support for --relative-assets option
css cache busting filter
Copied code for the compass asset dependencies detection (PR #362) from the SassFilter Class.
Methods copied: getChildren, partialize
Added compress options for UglifyJS
add function to set variables in scss parser
Update ScssPhpFilter.php

Class replacement for new ScssPhp structure
Merge remote-tracking branch 'upstream/master'
add minifycsscompressor filter

fix license and class phpdoc
Allow custom functions to be registered on the Lessphp filter.
Merge remote-tracking branch 'origin/pull/640/head'
added BaseSassFilter
Merge pull request #647 from mikeyclarke/lessphp-functions

Allow custom functions to be registered on the Lessphp filter.
allow functions.php to be included many times

apparently laravel workbench requires this
fixes #636
see #649
Merge pull request #641 from dominikzogg/minifycsscompressor

add minifycsscompressor filter
Merge pull request #639 from vladimmi/master

Update ScssPhpFilter.php
Merge remote-tracking branch 'origin/pull/635/head'
fixed coding standards
Merge remote-tracking branch 'origin/pull/632/head'
removed unnecessary check
Merge remote-tracking branch 'origin/pull/626/head'