Fix apache_configurator docs
Merge remote-tracking branch 'github/letsencrypt/master' into docs

Conflicts:
	letsencrypt/client/apache_configurator.py
script doc fix
Fix recent commits docs bugs
pylint client, add docs
Fix missing whitespace in todo
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
Use the right URL for the project

`lets-encrypt.org` doesn't work but `letsencrypt.org` does so use that.
Merge pull request #113 from fmarier/url-typo

Use the right URL for the project
Random small changes
Merge remote-tracking branch 'github/letsencrypt/master' into docs

Conflicts:
	letsencrypt/client/apache_configurator.py
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