Added JSONArray parsing. JSONArray in SocialistListActivity parsed.

Issue #65
Added "create new mail" button in MESSAGE layout that leads to NEW MESSAGE for testing
purposes.
JSON Parsing for New Message added. Wait on backend fixture to reach full
implementation.

Issue #65
Issue #45
Merge pull request #66 from tperez4/develop

Added JSONArray parsing. JSONArray in SocialistListActivity parsed. JSON in NewMessageActivity parsed. Layout changes.