Minor cleanup, preparing for 0.1.4 release

- Updated Ruby and gems.
- Minor style updates.
- Updated documentation with new features.
- Added release notes.

Change-Id: I1fd91e57ca3aebe1d8f994db57745c86bd9d3ab0
Use rspec-expectations expect syntax instead of should syntax

Bug: 66369
Change-Id: Ib73c2f73564d070d564a4ba22195b4fb1ca39919
Releasing patch version 0.1.4

Change-Id: If426e2758b8770236c73b1a196b79d5eefc329ba