pylint client, add docs
Add Challenge docs, pep8/docs interactive_challenge
More docs in challenge
Parameter checking and filling in TODOs
Single quotes instead of tics
PEP8: Use isinstance(name, unicode)
Remove some whitespace
Remove aggro type checking
Merge remote-tracking branch 'github/letsencrypt/master' into pep8

Conflicts:
	letsencrypt/client/client.py
Merge pull request #109 from kuba/docs

Docs
Fix doc mistakes
Merge remote-tracking branch 'github/letsencrypt/master' into pep8

Conflicts:
	letsencrypt/client/client.py
Fix redirect var flow
ca_server -> server
Move redirect to authenticate
Fixed undefined variable from Kuba-PEP8
git push origin masterMerge branch 'kuba-pep8'
disable pylint warnings
Merge pull request #111 from willoller/type_checking_client_acme

Parameter checking and filling in TODOs (acme.py)
Add get_version_method (cannot currently make unittest) fix pylint errors.