Sprint 9 release

Included in this release:

• Interface switcher between beta / 1.0
• Fix for subgroup cards
• Length limit on motion / thread titles
• Pending invitations card
• Fix for closed proposal appearance
• Add subgroup from groups page
• Chargify payments implementation
• Fixes for add / remove coordinator and deactivate group
• Additional strength to end-to-end tests
• Form validation and disable forms during loading