add method to retrieve a single list
add method for getting a user's lists
add method for creating a new list
add method for updating a list
add method to add an item to a list
add method to delete item from a list
add method to move an item on a list
add methods to follow/unfollow a list
Merge pull request #36 from jerodsanto/lists

Lists functionality.
Version bump to 1.8.0
Regenerate gemspec for version 1.8.0
ciao, whitespace
extended testing stubs to allow construction of an error response
added venue stats for managed venues
Adding an add_checkin_post method.

New endpoint that's part of the Foursquare Apps Platform.
https://developer.foursquare.com/docs/checkins/addpost
Adding an add_checkin_reply method.

New endpoint that's part of the Foursquare Apps Platform.
https://developer.foursquare.com/docs/checkins/reply
Merge pull request #37 from philm/master

Ability to get detailed stats for managed venue
Version bump to 1.8.1
Regenerate gemspec for version 1.8.1
Support for events/categories added