adicionados courses
Merge branch 'dev' of https://github.com/cesium/socios-api into chalkos

Conflicts:
	db/schema.rb
	db/seeds.rb
migrated courses after conflicts
updated serializer for courses
relations between models
Adds courses support
Fixes routes, indentation and private actions
Refactor course find
Merge pull request #1 from cesium/dev-joaofcosta

Merge Dev joaofcosta