Integrated Video VC now refreshes when a selection is made in its popover.
List of weeks popover in integrated GVC now shows 'no data' is there is no data.
Merge remote-tracking branch 'Therapist-program/master'
MAJOR FUNDAMENTAL changes have been made:
	-Addition of joint_id and joint_ex_id columns into the database
	-Use of joint_id and joint_ex_id to identify activities instead of the previous activity_id
	-Addition of a activity class to represent an activity better
All of the VC files have been changed accordingly

Fixed a bug, so that the activities TVC doesn't can have variable number of strengthening activities.
Merge remote-tracking branch 'Therapist-program/master'
Pulled and cleared conflicts