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 sass_interface api issues
Merge pull request #72 from mgreter/fix/sass_interface_api

Straightens out some sass_interface api issues
In Makefile, add a check for Darwin systems and add appropriate LDLIBS flag
Merge pull request #73 from wonja/makefile_ldlibs

In Makefile, add a check for Darwin systems and add the appropriate LDLIBS flag
Aligns build system with autotools build and travis-ci

Implements BUILD variable to link shared or static
Expects libraries in lib directory as with autotools build
Merge pull request #77 from mgreter/master

Aligns build system with autotools build and travis-ci