Renamed Toolbars to Toolbar Widget
Data- attr reference: Updated field container section.

Removed link to textinput widget. Added deprecation note.
Added toolbar section to data- attr reference. Addresses #82
Data- attr reference: Updated "Page" section.
Fixed broken links in data- attr reference.
Data- attr reference: Moved fixed toobar to toolbar section and link to toolbar widget entry.
Page: Removed note about IE7 because it's a C-grade browser as from 1.4.
Toolbar: Updated info about auto enhancement of buttons being deprecated.

buttonMarkup() has been deprecated as well
Toolbar: Auto adding of ui-btn-left/right has been deprecated.
Data- attr reference: Use the widget name as section heading.