General updates and fixes.

Dear thunder-spb,

at first i want to say thank you for your amazing work to publish a helper class for the public world of tanks api. I would like to improve it a bit and would like to improve it later again, so it would be nice if you would merge my changes into your master branch to publish this improvments to all other which also can use this.

What i have done:

- renamend WotClass.php to wot.class.php to align with wot-defaults.php
- removed old account rating call
- added new ratings calls
- refactored some code pieces and aligned code formatting to psr
- added full phpDoc for code completion

All calls are tested excluded ->getWiki()

Feel free to ask me if i should improve something from my work.

friendly greetings