Fix for UnboundLocalError in APIMethod.execute
Merge commit 'mccutchen/master'
Update contributors file.
Increment version # and update changelog.

Changelog file is no longer being maintained.
Github compare views will replace it.
tweepyshell: add support for IPython, with fallback to code.interact

IPython is a much versatile interactive shell compared to code,
use it's power if awailable.

Signed-off-by: Gergely Imreh <imrehg@gmail.com>
Update contributors and readme.
Implemented API.lookup_users()

This method allows you to perform a bulk lookup
of users by using their IDs or screen names.

For more info see http://apiwiki.twitter.com/Twitter-REST-API-Method:-users-lookup
FIX: tests: tripple-quote error (closing quotes missing)

Placed the opening quotes to the right indentation level, and
re-added closing quotes to be able to run the tests.
FIX: tweepyshell: ipython shell took original arguments

Previously the ipython shell kidnapped all tweepyshell input
arguments and interpreted as its own. Thus e.g. supplying
a username resulted in it trying to open a file with a name equal
to the username. This is not nice so let's put an end to it by
explicitly passing an empty arguments list.
tweepyshell: remove unused import
Fix an issue where 'user' parameter value was getting overridden.

This caused issues with lists_memberships() when trying to get memberships
of an user besides the authenticated one. We now only set 'user' parameter
to the authenticated user when no 'user' value is provided when calling
the API method.
Fix a recursion bug when calling API.verify_credentials()
Couple of typos fixed.
Merge 'jnr/master'
Added retweeted_by and retweeted_by_ids methods.
Added reverse_geocode, nearby_places, and geo_id methods.
Trends methods are no longer part of the search API.
Added friendships_incoming() and friendships_outgoing() methods.

See dev.twitter.com documentation for more details.
Use 'per_page' instead of 'count' paramter for list_timeline() method.

Fixes issue #27
Fix an error in the cursor tutorial.

Fixes issue #28