Remove Meducation specific code into a seperate Gem

I've extracted the Meducation SDK out of Larva and into [larva_meducation](https://github.com/meducation/larva_meducation). This allows us use larva with BinderSDK or Medical Search SDK etc.

The daemons will need to migrate but they won't break unless someone runs `bundle update` at which points the tests will catch this. A sample PR is on [Praecones](https://github.com/meducation/praecones/pull/16)