Support multiple load paths
Enables extra env vars to influence build
Make CC assignment "optional" in Makefile
Merge pull request #70 from mgreter/feature/extra-env-variables

Enables extra env vars to influence compiler options (i.e. coverage)
Merge branch 'master' of https://github.com/pornel/sassc into pornel-master
Merge branch 'master' of github.com:hcatlin/sassc into pornel-master
t push origin masterMerge branch 'pornel-master'
Straightens out some issues introduced with PR#69

Conflicts:
	sassc.c