Refactoring/ios (#300)

iOS app refactoring (native part):
- connection bugs fixed
- improved stability 
- logs from network extension

client/vpnconnection.h

@@ -11,9 +11,6 @@
 #include "core/defs.h"
 #include "settings.h"
 
-#ifdef Q_OS_IOS
-#include "protocols/ios_vpnprotocol.h"
-#endif
 
 #ifdef AMNEZIA_DESKTOP
 #include "core/ipcclient.h"