add babosa gem to imporve friendly_id parameterization

monkey path friendly_id to work with babosa
add slug to projects table
setup project friendly_id and association cascade
add basic project CRUD functionality
add pundit authorization system
add basic authorization for project crud
move respond_to to Application Controller
add project member crud
add uniqueness validation for user per group or issue or project
add ProjectParticipationPolicy
override simple_form collection input to apply selectize