Create courses_planned table in postgresql and have it returned in getStudentData

[farkam135]

Create a courses_planned table in postgresql that has 2 columns, the hashed id, and the course code of the planned course. There should be 2 helper functions in myrmeydb.js, a get planned courses which pulls the course codes and runs a searchSchedule on them to get the full course object and a delete planned course which takes a hashed id and course code and removes it from the db table. This should then be called in getStudentData in server.js and added to the courses object under key 'planned'.