JMA - fix comparator bug in trim()
Merge branch 'feature/extend-support' of https://github.com/DealerDotCom/libsass into feature/extend-support
Add debug levels for targeted debug spew
Add NONE debug level
Merging in feature/extend-support to pick up the debugging printing changes. I changed the default print level in debug mode to be NONE instead of ALL. I also removed some commented out code. There should be no functional changes in this commit.

Merge remote-tracking branch 'origin/feature/extend-support' into feature/extend-support-node-only

Conflicts:
	extend.cpp
	sass_util.hpp