[gh-5] Rename unl theme to unl_og

Will house small OG mods with unl_wdn as base theme
[gh-5] Remove unl_og files that are duplicates of unl_wdn
[gh-11] Add unl_og_menu_breadcrumb_alter() for manipulating OG breadcrumbs
[gh-11] Use theme_breadcrumb to add UNL breadcrumb to front

hook_menu_breadcrumb_alter is not called on front page for some reason
[gh-11] Pop page title off breadcrumbs if on group page
[gh-11] Set <link rel="home"> in unl_og using hook_html_head_alter
[gh-10] Add css to hide institution title and page title on group home pages
Merge pull request #12 from erasmussen2/issue-11

Closes #11
`$group` can be false, so check to make sure that it is not false before treating it as an object.
[gh-25] Check that OG Context module exists in UNL OG theme
[gh-27] Fix top level page breadcrumbs

Pages in the main group  have their title doubled in breadcrumbs
Merge branch 'issue-27' into develop

Conflicts:
	sites/all/themes/unl_og/template.php
[gh-17] Further revisions to breadcrumb behavior
Merge pull request #28 from erasmussen2/issue-27

Closes #27
Enable menu and breadcrumbs on non-group pages.
Remove some debugging code
[gh-78] Check isset($group_breadcrumb) and cleanup
tag may not be set if type='markup'