Bug 9689 - Replace YUI buttons on the OAI sets administration page with Bootstrap

Bug 9689 - Replace YUI buttons on the OAI sets administration page with Bootstrap

This patch converts the toolbar on the OAI sets administration page to
Bootstrap, replacing YUI button code with Bootstrap markup.

To test, view the OAI sets administration page and confirm that the "New
set" button looks correct and works correctly.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Comment: Works and looks nice. No errors.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Works nicely, no problems found.
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>