Updated dependencies

- java now at v7
 - app engine now at 1.8.0
 - gson up to 2.2.4
 - added java servlet APIs
 - junit 4.11
 - jmock 2.6.0
 - selenium 2.33.0
 - gae plugin 0.9.5
Updated API documentation

- fixed home link
- fixed entries data format example
Enabled sessions in App Engine
Updated unit tests for new jMock version

- one() is now deprecated, using oneOf() instead
Angular backed interface

- new UI based on angular
- not yet enabled