View: bug fixes, PSR-2, added removeStyle, rewrite setStyle and addStyle

1) PSR-2 and comment fixes
2) Rewrite of setStyle and addStyle to match setClass, addClass
3) New method removeStyle to match removeClass

Two questions arose (identified by TODO) in methods set() and setHTML(). Can you please look at them?
Update View.php
Merge pull request #364 from DarkSide666/patch-3

View: bug fixes, PSR-2, added removeStyle, rewrite setStyle and addStyle