Switched to node-phantom-simple
Don't test dev branches
Silenced node-phantom-simple leak warnings
Fixed throwing from command line
Fixed missing docstring
Refactoring
Added comments
Merge branch 'master' into performance
Major rewrite
Major rewrite part 2: All tests pass
Use filter instad of filterSeries; test only master
async.filter does not support errors
Added vendor-specific-css test
Added thread pool for PhantomJS
use new Error() instead of strings
Merged changes in master
Added "How" paragraph in README
Merge branch 'master' into performance
Updated "How" paragraph to reflect new functionality
Updated devDependencies