Add stages to import
Dynamically set parameters on stages.
Fix data set to set the required parameters on stages.
Merge pull request #37 from elisapp/sample_data_stages

Add stages to import
Merge remote-tracking branch 'origin/master' into live_api
Refactor API to use ActiveModelSerializers for Live-Data. Add new stages for leagues (which Kin-Ball uses). Fix some bugs.