Allow user to add option when using the LessFilter
LessFilter: Add setLoadPaths method
ScssFilter: Add setLoadPaths method
LessphpFilterTest can't inherit LessFilterTest because we didn't use the same options
Allow user to add Parser option such as "relativeUrls"
We can't use parserOptions attributes because each assets alter this var
Implemented LessphpFilter::getChildren() including unit tests. Just one
regular expression is not working correctly.
Replaced self-built regular expressions with a CssUtils::extractImports()
Merged both outer foreach and wrote a test to ensure, LessphpFilter::getChildren() does not return duplicates.
add a setWrap method to the UglifyJs2 filter.
Merge pull request #417 from igwan/patch-1

add a setWrap method to the UglifyJs2 filter.
Merge pull request #404 from ksamc/master

Add setLoadPath method to LessFilter and Sass/Scss-Filter
Merge pull request #403 from BenoitLeveque/add-option-less-filter

Allow user to add option when using the LessFilter
added "http" test group
child inherits env by default
Merge remote-tracking branch 'rejinka/feature-lessphp-filter'
cleaned up less children
updated changelog
added manual inherit of environment

fixes #411
updated branch alias