Master

Changes to w2ui.css : 
added position : relative to style for grid and form....
this will fix a problem when the widget boxes are inside a container with a scroll bar, then the widget will stay in place
change position of the close cross for the uplaod field widget, if the closes cross is right, when the file is to long, you cannot remove it...
In W2field, added a control in the onclick in order to deny the filedialog open when the number of file is greater than max... Just now I am thinking that I am not sure about what happens if you specifie inifinite number of files.
in W2forms : 
added the  equalto option, with a  field name. When the 2 fields are equal, it is ok, usefull for password and email verification.