fixes memory leak and other issues with test_fasta
adds libdivsufsort dir to includes for the unit tests
adds travis file
fixes travis syntax
fixes download link in travis build script
fixes travis scripts missing sudo
fixes travis paths
use betters compilers
fixes travis library path
more travis trial and error
adds travis build status to readme
release v0.7.3
Merge branch 'master' into ubuntu

Conflicts:
	.travis.yml
	README.md