Database Backed Storage

Move from the XML persistence layer to a database enabled implementation.

Time tracking

Estimated time	500.00 hours

Related issues
	Feature #1755: implement database-backed filtering/walking optimization
	Feature #1759: design a database to back all TRPL processing
	Feature #1760: create import tools to add or replace flat files stored in the database
	Feature #1761: create export tools to output flat files stored in the database
	Feature #1762: create tools to list, delete and otherwise manage flat files stored in the database
	Feature #1763: write an AST persistence plugin for database-backed AST loading/persisting
	Feature #1764: rework the pattern engine/TRPL runtime to operate against the database

TRPL