Fixed compatilibility with dev nette after nette/nette@ba801a3
Dialog: method getFacebook() is not required anymore
Dialog: refactored
Facebook::api() throws FacebookApiException
cosmetics
Fixed notice indefined index request_header in CurlClient
Dialog url was removed
LoginDialog: specify cance_url
Fixed security issue https://github.com/facebook/facebook-php-sdk/commit/7324e40d74599a747e81af358c6ef5405539a5dd
Catch malformed json exception in CurlClient