May 2015 release 3 - additional smart search fields

This release further extends our smart search capability and squashes a couple minor bugs.  

Smart Search, new fields

• We've added more fields to advanced search that are compatible with the new smart search user and date picker.
• Markup - you can choose which assets contain markup or do not, and then if they do contain markup select who created the markup.
• Upload/Modified - you can now search assets by who the uploader was or when they were uploaded or modified.

Bug fixes

• minor bug fixes