PyPAM replaced with ctypes implementation.
Skip pam testing in travis.
Fixed proxy unit test.
travis tuning.
travis tuning.
travis: install PyPAM.
travis troubleshooting.
add python-ctypes dependency.
added pam test.
Merge branch 'master' into pam

Conflicts:
	.travis.yml
	test/unit/test_pam.py
Merge pull request #21 from jortel/pam

PyPAM replaced with ctypes implementation.
Update README.md

Add travis build link.
Update README.md

Fix README.md travis link.
Merge branch 'master' into ghost