redirect user to home
ensure migrations run from scratch. they'd become broken over time
Merge pull request #902 from loomio/bug/replace-leave-group-message

redirect user to home when leaving group
ensure show discussion works. inbox checks this requirement.
add permissions on sub-group creation
disable sign-up button when clicked
Merge pull request #920 from loomio/bug/inbox-mark-as-read-broken

fixes inbox mark as read.
Merge pull request #921 from loomio/fix/disable-signup-button-signup-form

disable sign-up button when clicked
New contribute icon & tooltip; title case for search placeholder
Merge pull request #922 from loomio/heart-icon

New contribute icon & tooltip; title case for search placeholder
Ensure motion is deleted with discussion
Merge pull request #919 from loomio/ensure-migrations-run-from-scratch

ensure migrations run from scratch. they'd become broken over time
Merge pull request #911 from loomio/bug/motion-not-deleted-with-discussion

Bug/motion not deleted with discussion
Merge pull request #913 from loomio/bug/user-create-subgroup-permissions

add permissions on sub-group creation
remove loomio logo from invitations
add read_comment_count_to_discussion_read_logs
Merge pull request #917 from loomio/add-read-comment-count-to-discussion-read-logs

add read_comment_count to discussion_read_logs
comment out data migration to prevent a read lock
migrate pending memberships to membership_requests
Merge pull request #901 from loomio/bug/migrate-membership-requests

migrate pending memberships to membership_requests