Move some object properties to prototype.
Small CSS clean-up changes
Small w2popup kyeboard fixes
Added $().w2marker(str) to highlight text on screen.
Small grid fixes
added url feature to list
added url feature to list
Merge pull request #155 from catodique/master

Here is my pull request after you replied to my mail
Added .w2ui-spinner class for the spinner
Move some properties back to the object from prototyp

Inheritance was not working properly
Implemented easy way to do subgrid in a grid.
Laid foundation for w2utils.keyboard object
Small fixes for subgrid, other CSS
Recompiled JS and CSS