chore(pub): Update with SDK 0.7.5
feat(annotations): refactored metadata extractor into injectable class
feat(Http): transformRequest, transformResponse
feat(http): AngularJS-style caching
fix(source_metadata_extractor): added support for ! attr map spec
feat(http): Setter for default headers
feat(ng-template): initial implementation

Closes #137
feat(ng-unless): new ng-unless directive

Closes #126
feat(Http): Pending requests
feat(filter): added basic filter implementation

Closes #151
Closes #144
Closes #147