Missing fields are added to commit details

* Added diff stats and company name to module details screen.
* Added subject line to engineer details screen.

Fixes bug 1200645

Change-Id: If579173e83e40feb473600137060ed2076e53ba4
Implemented bulk read from memcached

Implements blueprint bulk-memcached-io

Change-Id: I20e20653b1ac24ee3239fc481f70187f4a71989f
Merge "Implemented bulk read from memcached"
Implemented update mechanism for memory storage

Implements blueprint update-mechanism

Change-Id: I7c8381366f9a76084b6e1a9e1cc3a9ad2502cdcb
Removed usage of update time concept

Fixes bug 1201445

Change-Id: Ie9eff190cc680873eaaf64474e0382910257b66c