Fixed issue with while loop running forever because of recursive calls.
Engram selector now uses the conversation objects.
Output now supports multiline statements.
Each statement now tracks a statement that it was a reply to.
Updated tests for new output type.
Date objects are now used for statements.
Fixed NoneType object being added to results.
New statements now update correctly.
Updated twitter search for algorithms module.
Added tests for conversations.
Results with equal weight can now be returned. Closes #10.
Merge pull request #11 from gunthercox/conversation

Create conversation object