Fixed Mongoid compatibility

Signed-off-by: Rémy Coutable <remy@jilion.com>
update gems
Fix invalid down migration (add t. prefix to remove calls)
add missing option to generator
document last added option
remove test/ from requires, it's in path
Test against 1.3.x
bump version
bump rails version requirements so we can use with rails 3.1
Merged pull request #83 from jackdempsey/rails_3_1_beta.

Rails 3 1 beta
add after_accept_path_for method
simplify test app
document after_accept_path_for
Extract methods required to send invitations in a module, so a devise model without invitable can invite others
document DeviseInvitable::Inviter module
bump version
update to README to clarify where inviter and invitee are redirected after respective actions
Merge pull request #87 from jackdempsey/readme_update

Readme update
return class.invitation_limit when invitation_limit is not set
Edited README.rdoc via GitHub for Healthism.com