Refactored factories for players and teams
Added teams controller and its tests and also its routes
Refactored player and team factories
Refactored playe, team and matches specs
Refactored teams controller, added destroy action and its test
Refactored team controller and its test
add rabl gem
set render_views as true in the rspec config (to make it execute the rabl files)
add rabl to show team
add spec to ensure team in returned when visiting its json route
Remove the Has type from the picture property at Player and Team model
Refactored teams controller and it spec
Changed the text at teams controller spec
Merge branch 'feature/player_api' into develop

Conflicts:
	app/controllers/api/teams_controller.rb
	app/views/api/teams/show.json.rabl
	spec/controllers/api/teams_controller_spec.rb