Added SubCategory model
Added PlannedCategory model
Modified SubCategory model to add a unique ID independent of categ/inst PK
Added PlannedCategory detail table/model
 Added Timeslot model and tiny seed
Added planification model relationships
Added a name property to SubCategory model
PROJ-132: Added views for categories management'
Merge branch 'planification' of github.com:Inovitex/fcms into planification

Conflicts:
	app/models/timeslot.rb
	db/schema.rb
	db/seeds.rb