Application refactoring.

Tests utilities moved from tests/base to gottwall/utils/tests.
Removed redis storage and moved to
 http://github.com/GottWall/gottwall-storage-redis plug-in application.
Removed redis backend (transport) and moved to
 http://github.com/GottWall/gottwall-backend-redis plug-in application.

Removed all tornadoredis and redis calls.
Migrated to tornado 3.2.