Merge pull request #164 from Damgaard/master

Fix limit=None bug in replace_more_comments
Bump to 2.0.1.
Fixed bug when comparing MoreComments classes in Python 3.x
Bump to 2.0.2 to fix python 3 issue.
Add `delete_image`. Update `update_checker` dependency. Version 2.0.3.
Prevent print keywords in tests. Version 2.0.4.
Make Subreddit.get_comments part of _methods

This allows it to be used by the Reddit object, similair to get_flair
or get_banned. This change means helpers._get_section is now only used
to generate non-subreddit listings as per it's docstring.

Also make Reddit.get_all_comments call Reddit.get_comments with 'all'
as the subreddit.
Add gilded_only to get_all_comments & get_comments
Bump to version 2.0.5.
Add support for unmoderated listing
Add unmoderated test. Version bump.
Use new modaction attributes in tests.
get_flair_list now works when logged in and not a mod.
Clear existing http sessions on authentication change.
Allow for unsetting has_mail in get_unread.
Add get_friends and get_blocked to LoggedInRedditor object.
Update logged-in-user's has_mail with get_unread.
Remove unneded auth code.

With 71c678c both login and set_access_credentials
run clear_authentication. This means some of the code lines
in those two methods are now unneded.
Don't use ssl for get_friends.

This change will break the get_friends and get_banned functionality until there
is an upstream fix that does not require ssl for those endpoints.
Fix MoreComments.comments bug.