added the tv_program tables
added the change for model
added the change for tables
added the unique value
added the basic route for tv_group & tv_station, and added the html&json&xml view for them
added the support for tv_program
added the test data in seed
resolved the access problem and added the program in tv_programship
acquire the begin/end time in tv_programship and show in tv_station both for html/json/xml