Small documentation fix
Merge pull request #44 from mweimerskirch/patch-1

Small documentation fix
use method_exists() instead of is_callable() to prevent strict standards error message
Merge remote-tracking branch 'origin/master'
Merge branch 'master' into 1.6
correct arguments for Less_Tree_Element
pass $currentFileInfo to Less_Tree_Quoted
ignore adding empty strings
sourcemap testing
fix isMathOn() and check for relativeUrls
remove Util.php
remove naive setters/getters
remove unused code
sourcemap options changed to reflect options in less.js
fix getSourcesContent
remove sourceMapOptions array
remove unused php file
relativeUrls default to true, update less.php.combine