Fix an invalid read.

This probably only occurs on the empty file test.
Merge pull request #147 from QuLogic/valgrind

Fix an invalid read found with valgrind.
An old version of sass-spec? Why?
Changing the way that tests are run. Also, adding in Travis support.
use new libsass travis status icon
fail hard and make sure sassc runs!
ah. so it was confused about the folder sassc existing, so wasnt building because of that. now using the fqp
travis, take it from the top
okay, so maybe this will fix my little issue...
my bash-fu is weak
adding the `optional` keyword
Update Makefile

Tests weren't running!