New Meta-Tag Module!   ( call them HashTags, or Tags, or whatever ) 

Add basic implementation for a new meta-tag functionality in the SeltzerCRM system .

This module is for associating arbitrary "meta data" with member/s.
This can be useful for making arbitrary groupings of users that have special meaning to you.
Examples:
We might have one called "FrontDoor", which entitles a member to get a physical key to the building....
Or one called "Machinist", which means they have passed basic safety assessment to permit them to use our Mill/Lathe.
It's kinda like an extension to the Permissions system, but for managing things external to SeltzerCRM.  
I expect an API will get written at some point to get move value out of this.