basic mixpanel tracking api
fixed small syntax erros
fixed first round of changes (mostly style) thanks to joe and josh
re-added identify. made people things optionally persistent
fixed a few things with initial unit testing.
the beginnings of some tests.
fixed changes as per last pull request. added sending batch events
added some light documentation
removed ip address logic
changed 'engage' function to 'epople' function to be more consistent with other libs
moved comments around, fixed commas
seems to be working. moved People to inner class, added helper functions for people
put all requests through write_request function
wrote some basic tests, fixed up batch
get rid of nested people object
ignore pycs
added in verbose flag
removed len check for batch requests - unecessary given verbose flag
changed name of _encode_data to _prepare_data since that better describes it
Merge pull request #1 from mixpanel/initial-lib

Initial lib