Multi-tag search API

[alfred-stokespace]

Description

The user can AND or OR search media by more then one tag.

examples...

ANDing http://localhost/search?t=t,g,d => This means find media that have t and g and d tags or show nothing (assuming that t,g,d are tags that exist for some media. ORing http://localhost/search?t=-OR,t,g,d => This means find media that have t or g or d tags (assuming that t,g,d are tags that exist for some media

Steps

If deploying via local install method

Pre-deploy

1. git pull

Post-deploy

1. systemctl mediacms restart

[mgogoulos]

Thanks for the PR! I'll try to find some time to review it and test it soon!