Adding /help/configuration endpoint

https://dev.twitter.com/docs/api/1.1/get/help/configuration
Fixed broken User.lists() API call

API method `lists()` was replaced by `lists_all()`.
added friends & followers api routes
Change Tabs to Spaces
Basic Model __repr__ implementation (issue #251)
Fixing typo in previous commit (__repr__  misnamed.)
added tests for friends() and followers()
added to CONTRIBUTORS
Merge pull request #249 from sente/master

Added endpoints for followers/list.json and friends/friends.json.
Changing the path for report_spam.json according to API 1.1 docs
Merge pull request #270 from Oire/master

report_spam changed according to API 1.1 docs
Added language parameter to streaming filter

(see: https://dev.twitter.com/blog/introducing-new-metadata-for-tweets)
Merge pull request #278 from wywygmbh/master

Pull request: Added new language parameter to filter endpoint
added timeout to api constructor with default 60s, set timeout when creating HTTPConnection and HTTPSConnection in binder.py
	modified:   tweepy/api.py
	modified:   tweepy/binder.py
removed #FIXME implement timeout
	modified:   tweepy/binder.py
added to contributors file
remove endpoint as referenced by @joshthecoder in #288
Merge pull request #290.

- Removed un-needed commit.
Merge pull request #285.

- Fix code style issue.
Drop support for Python 2.5.