Merge pull request #289 from oshoma/master

Doc update for Mongoid 3.x users
Uses secure RubyGems URL
Merge pull request #290 from vfrride/patch-1

Uses secure RubyGems URL
dummy destroy
actually doing something
destroy not destroy!
added some tests and refactored controller somewhat
changed confirm wording
fixed test
Merge pull request #294 from niclas/destroy-action

Destroy action
fix for the migration template
Merge pull request #295 from niclas/uniq-token-index

fix for the migration template
fix scopes, invitation_not_accepted was selecting registered users
add active scope, fixes #299
bump to 1.1.7
fix scopes
rspec-rails not used
try to fix tests on travis
Adding docs on setting invitation_sent_at if skip_invitation is true
Merge pull request #303 from hlascelles/master

Adding docs on setting invitation_sent_at if skip_invitation is true