Add acme_test. Sphinx-like doc in acme module.
Merge remote-tracking branch 'github/master' into acme_test

Conflicts:
	letsencrypt/client/acme.py
python-augeas from PyPI

https://github.com/hercules-team/python-augeas/issues/2#issuecomment-64116945
Merge pull request #64 from kuba/pypi-augeas

python-augeas from PyPI
apt-get install libaugeas0

libaugeas0 is still required, despite python-augeas from PyPI
Merge pull request #69 from kuba/libaugeas0

apt-get install libaugeas0
LetsEncryptClientError
Less generic exception for subprocess.check_call.

https://docs.python.org/2/library/subprocess.html#exceptions
Less generic exception catching in send()
Merge pull request #60 from kuba/acme_test

Add acme_test. Sphinx-like doc in acme module.
le_util cleanup, le_util_test
Fix JOSE encoding mess
Better tests for jose b64 padding
Allow unicode input for JOSE Base64
Fixed typos in crypto_util.py
Bring in @Kuba PEP-8 BranchMerge branch 'kuba-pep8'
Remove heisenbug from acme_test
py26 doesn't support set {} constructor. Use frozenset.
Merge remote-tracking branch 'github/master' into le_util_test

Conflicts:
	letsencrypt/client/client.py
	letsencrypt/client/crypto_util.py
Merge remote-tracking branch 'github/master' into bugs/44

Conflicts:
	letsencrypt/client/client.py