write cukes for group membership request

Conflicts:
	db/schema.rb
add Request membership button
create membership request controller
create membership_request model

Conflicts:
	db/schema.rb
create simple_form
wip
creatin membership requests view for admins, tinker with routes
add mail verification gem, move membership_requests into groups, start writing controller specs
write creat action with tdd
move all rewuest controllers to same place, scaffolrd the approve aciton