added a new "auto_focus_button" property for indicating the button to place the focus on when a dialog box is first shown
simplified dialogs' HTML markup and all the classes indicating various states/setups of the dialog box are now added to the main container
some of the alignments done previously from JavaScript are now done from CSS - but still working in IE6 :)
completely rewritten the CSS for the themes and we're now using clean-css to optimize CSS output, resulting in a reduction of 0.5KB for the flat theme and 1.8KB for the classic theme
added a new materialize theme, inspired by Google Material Design