Add boolean mode to site-wide search. Ref #216
Add explanatory text to search settings page.
Add advanced site-wide search. Ref #216
Search all record types by default. Ref #216
Merge branch 'master' into issue_301
Fix busted submodules (again).
Fix edit item styling for tags.

This moves the opacity/show/hide logic into the CSS, and makes it work
like it did before, but its still very confusing.
Merge branch 'master' into issue_301
Allow multiple hook callbacks per namespace. Fix #303
Use 'items/browse' url for public_nav_items().

- Not defining an action sets all navigation items as active otherwise.
Remove extra div wrapper.

- The "search-selects" wrapper made fields difficult to target in a consistent way.
Add comments to Omeka_Navigation and Omeka_Form_Navigation.   Remove Omeka_Navigation::removePageRecursiveBy().  Fix Omeka_Navigation::removePageRecursive() so that it removes all instances of a page throughout a navigation tree.  Issue #301
Rearrange actions for mobile view.

- Use a better fluid simple search form.
- Remove arrow decoration to allow for content multiline nav items.
Fix logic in Omeka_Navigation::removePageRecursive().  Issue #301
Fix test for public_nav_items.
Merge pull request #300 from willynilly/issue_134

Fix Issue #134
Float item thumbnails to the left and add margins for different breakpoints.
Adds Decorator SavePanelHook back in.
Change nav to use Zend_Navigation.

nav() uses the menu view helper, public_nav is gone, but the existing
functions for main and items nav on the public side now just directly
use nav().

The CSS class for the current page is now "active," not "current."
Update submodules for nav() change.