PHPdoc annotations

[achimha]

Given that you're actively working on it, I thought I'd better ask before sending a pull request.

The PHPdoc is incorrect in a lot of places which makes an IDE like PhpStorm spit out a lot of warnings. The issues mainly are:

• namespace references are often fritak* whereas they should be \fritak* with a leading backslash, otherwise a consumer with its own namespace will not work correctly
• missing @param/@return in constructors
• sender parameter should be int|\fritak\MessengerPlatform\UserRecipient like given in the description below
• what is "public function sendComplexMeesage($message)"? I suppose a spelling mistake?

[Fritak]

Thank you. I will fix that, or if you'd do it instead of me... I'd be pleased, really :)

Yes, spelling mistake. I will add @depricated.