Refactoring I.

- Revamp whole DB to Display flow
- Filter Pipeline, arbitrary filtering and sorting
- Binary tree arrays for faster lookup & manipulation
- DB: introducing custom functions
- DB scheme: split req into heap & cache
- cache written by GlassVPN only
- heap written by Main App only
- Introducing DB separation: DBCore, DBCommon, DBAppOnly
- Introducing DB data sources: TestDataSource, GroupedDomainDataSource, RecordingsDB, DomainFilter
- Background sync: Move entries from cache to heap and notify all observers
- GlassVPN: Binary tree filter lookup
- GlassVPN: Reusing prepared statement

main/Extensions/SharedState.swift

@@ -1,7 +1,7 @@
 import Foundation
 
-let dateTimeFormat = DateFormatter(withFormat: "yyyy-MM-dd  HH:mm:ss")
 var currentVPNState: VPNState = .off
+let sync = SyncUpdate(periodic: 7)
 
 public enum VPNState : Int {
 	case on = 1, inbetween, off