Removing LESS variables mess:

- removed 1, 2, 3 level variables
- refactor caret.less
Removing LESS variables mess: simplified large display stylesheet
Removing LESS variables mess: deleted variables
2nd and 3rd level widths are hardcoded on 200px because of demonstracy purposes now
Bootstrap inverted removed from skins.

From Boostrap skin it is different only within some variables. This part of code moved to boostrap-fixed.less example
Bootstrap LESS files cleanup
Removed docs.less bloat…

- lots of navigation colors, it has to be as default values in Pine
- Bootstrap forgotten styles
Another round of brutal cut into variables
Variables for hover and active background too
Examples on small screens doesn't need border and better no-Bootstrap examples top position
Pine trigger inverse color