Function updates/additions

Adds mh_license() function, changes “photos” label to “images” and
fixes mislabeled div.
Adds mh_license() and rearranges some HTML
tour comments option
CC License options
minor: footer styles
Update VideoJS

Updates VideoJS scripts and styles, using their CDN. Removes
mh_video_ResponsifyVideoScript() and other functions and variables that
have been superseded by improvements to the core library.
Tours: style-able stop numbers
Files: template markup
CSS: tour and file templates
Update for file SEO and use CDN for VideoJS
Update and add custom functions

New: mh_file_caption (use more fields to build caption)
Update: mh_item_images, mh_item_video, mh_item_audio (use new captions)
Update: mh_item_video (use VideoJS CDN, etc)
Images on Browse & Changes to Hero structures

Brings flexible images (a la CSS background-image) to “desktop” browse
views, which entailed updating the slider & image tile hero scripts,
along with some helper functions that had previously used ing tags.
Also, tours (on browse) are no longer presented in a slider, which is
now only for items (including those listed on tours/show). Got all that?
CSS improvements
bugfixes
More bug and display error fixes
Adds basic support for full search

Includes basic support for Omeka 2.x-style searching across multiple
record types (items, files, collections, etc), not just items. Note
that the search input field still points to items-only search for now.
CSS
Option: random or recent on homepage slider
Adds barebones template for items-only advanced search
Minor: markup/styles