chore(Grunt): don't remove root dir from zip
chore(Grunt): include dot files in the final zip
docs(contribute): add note about running command line as admin on win
feat(angular.bootstrap): support deferred bootstrap

This features enables tools like Batarang and test runners to
hook into angular's bootstrap process and sneak in more modules
into the DI registry which can replace or augment DI services for
the purpose of instrumentation or mocking out heavy dependencies.

If window.name contains prefix NG_DEFER_BOOTSTRAP! when
angular.bootstrap is called, the bootstrap process will be paused
until angular.resumeBootstrap is called.

angular.resumeBootstrap takes an optional array of modules that
should be added to the original list of modules that the app was
about to be bootstrapped with.
feat(http): set custom default cache in $http.defaults.cache

When we need more control over http caching, we may want to provide
a custom cache to be used in all http requests by default.

To skip default cache, set {cache: false} in request configuration.
To use other cache, set {cache: cache} as before.

See #2079
docs($resource): Added an installation section.