adds professionals

adds curriculum, professions and titles to user
adds 'profesional' role
creates professional_fields_partial
Merge branch 'dev' into ft_professionals
create uploader files
upload curriculum to professional
create model position
create model position
create _postion_fields to user
strong parameters branch user
create table position_users
modified strong parameters
modified positions table
add views for positions
remove strong parameters position in branch
Merge branch 'ft_professionals' into dev

Conflicts:
	app/views/backend/shared/_sidebar.html.erb
	config/routes.rb
	db/schema.rb