* Delegation: Configure what OpenID version the provider is supporting
(Version 1 or 2 or both)
* A little refactoring done to make code more readable.
* If no user has configured his OpenID yet, there will be no OpenID
login but a info about that.
* No need to enter your OpenID URL anymore, just choose the user and log
in (can be switched back to old style)
* Was not able to change users OpenID url, if logged in with another
external login (like BrowserID)
* Added Google and Yahoo as shortcuts. They provide OpenID with a
generic URL.
* New PHP-OpenId lib
* Patched it with a pull request found at GitHub solving depreated
problems
* Removed temp storage path from config (as no user knows what to do
here) and replaced it with a templates_c path.
* A lot more documentation inside the plugin configuration.
* A lot of fixes.
