Upgrade Metatag to 7.x-1.20

Merge branch 'develop' of github.com:unlcms/UNL-CMS into develop

Update unl_fourone submodule pointer

Merge pull request #897 from ericras/rewrite-miss-lancaster

Support case-insensitive requests for files on lancaster.unl.edu

Upgrade Drupal Core to 7.39

Update unl_four_og submodule pointer

Update submodules

Update unl_four submodule

Merge pull request #880 from ericras/issue-879

Closes Issue 879

Upgrade Drupal Core to 7.34