materials also searchable by page content

[camriddell]

Add ability to search by page content (in addition to authors, abstract, title, name, remark-name)

Builds a json payload to deliver searchable information about each item instead of using html information present on the materials.html page.

This makes the size of the page a bit larger, but offers a good amount of flexibility for the search.

@DrDrij can you do a quick local test? Everything appeared to work on my end, but another set of eyes will make sure this sails smoothly.

[DrDrij]

@camriddell Damn, nice work! Pulls unique strings from any metadata of any material.

Looks good to go.

[DrDrij]

All tests working here..

[camriddell]

Awesome! Merge away if you think this is good to go :)