Libturpial: Use https by default for twitter api

See https://dev.twitter.com/docs/security/using-ssl for details
Merge pull request #88 from Skunnyk/https

Libturpial: Use https by default for twitter api
Set version numbers in requirements.txt
Fixed exception in line 308 of config.py
Fixed get_list_id method in account model
PIN stored no more
Fixed flags variables on status model
Fixed broadcast with empty or none account_id array
Fixed cache calculation
Updated load function for oauth credentials
Fixed issue with verifier removal
Added new field in status model to store original timestamp from twitter
Loaded account after register
Added followed_by field to profile in order to know if user is followed by the profile owner
Added and removed friends from local list after follow, unfollow, block and report as spam
Fixed delete cache method
Removed unnecessary information
Working on a new config module
Implemented new config module with support for extra options handled by external sources and fixed some other issues
Updated changelog and version