Reinstated parameter passing
Adds support for namespace options
Makes Grape::Endpoint quack like an ActionController
Removes unnecessary dependencies

There are some dependencies that are not required for this gem (eg.
tilt) that I'm removing. In addition some of the dependencies were only
necessary for development/test so I'm moving all of that into the gempsec and
making that clear there.
Moves Grape::Endpoint extension into a module

Adding methods into the Grape::Endpoint class that
ActiveModel::Serializers are relying on from ActionController as well as
a few convenience methods for Route and Namespace options. I believe we
can expand on some of the empty methods here to allow for higher (api)
level option setting and defaults. This is a first step in that
direction.
Spec setup updates, almost passing
Ensures there is a root available for arrays
Merge pull request #4 from campaignio/master

Support for namespace options and rely more on active_model_serializers