Updates encase php
Adds Ajax Packager and tests.
Moved to Arrow\Asset namespace with packager
Updates ignores
Reorganizes Options.

* Removed Duplication in Options, removed old admin-post style.
* Implemented Packagers for Ajax & Options.
* Made the OptionsPage independent of frontend framework
* Currently using Ember, PluginMeta can override that completely.
* Simpler inclusion of support scripts into OptionsPage.
Merges branch 'feature/reorganize-options' into develop
Improves Ajax Controller Tests
Improves Ajax & Tests
Improved asset tests
Improved Options & Tests
Improves Test Coverage
Fixed typos