Added several view controllers, and lift model.

Assistance lifts are now ordered on create.

Added updating to edit lift view controller.

Custom lifts now reload on view appear, and right aligned edit inputs.

Fleshed out custom workout view.

Added model and store

Made custom assistance workout data match fto lifts.

Wired custom workout view controller. Need to implement.

Wired more views. Added stub test to implement.
Fixed Migrate2to3 to handle custom assistance
Removed selection for custom asst add lift. Wired display of workout view controller.
Wiring views.
More wiring. Set data can now be changed. Need to make rows editable instead of just addable.
Handled empty weight or increment data set attempt.
Added delete to sets and custom lifts.
Added skeleton templating for setting up custom assistance.
Added custom assistance plan builder. Need to figure out why custom assistance isn't saving.
Switched 'writestores' with 'syncstores'. Otherwise data is lost on startup.
Implemented cycleChange for custom assistance.