DB: Add current connection and connection driver fields
DB: Add quoteColumn method to properly quote column names in queries
DB: Have DB::query() return the affected row count
Config.db: Properly signal non-existing keys on get()
Facility: Fire com.sergiosgc.facility.replaced hook
Switchboard: Handle 404 later than at default priority on com.sergiosgc.zeromass.answerPage
Rest: Initial commit