Merge pull request #149 from poornerd/master

Add Instagram Provider
updated changelog
removed unused trait
Fixed the error message for invalid token.
Merge pull request #152 from platypii/master

Fixed the error message for invalid token
Fixed #144: Successful change password logs user out
fixed wrong package names for the Foursquare, Instagram and XING providers
updated change log
- Added IdGenerator and AuthenticatorStore plugins with their default implementations for the new authenticator cookie.
- Introduced an authenticator cookie to track users. The Play session is not used anymore.
- Fixed issue #144: Successful change password logs user out.
Added password change, password reset and sign up events
- Made SecureSocial compatible with Play 2.1.
minor changes to the docs
fixed wrong logout implementation
Add the email to the flash messages in Registration.handleStartSignUp

This is done so that the email address that the user shall check can
be displayed in the target page / template.
Add support for plain text, only html and multipart emails.

The templates plugin already allows to return customized content
for the emails. Though, the email content is already sent as content
type html.
This improves it to allow sending only text, only html or multipart
emails. The templates plugin now returns a tuple of Option[Txt] and
Option[Html], so that clients can choose which parts they want to
provide. As the mailer plugin handles null or empty content gracefully
we can reduce None simply to null or an empty string (the latter is chosen
because the mailer plugin also passes an empty string if a part shall
be omitted).
Update documentation for TemplatesPlugin text/html/multipart support.
- Added a makeTransient property for the authenticator cookie.
- Fixed: absolute timeout was not being picked up from the conf file
- clean securesocial values after login from the session
- renamed keys used in session
updated change log
update version in docs