VortexTracker26-dev22ts3

First attempt of adding 3-module Turbosound (ZXSpectrumNext type).
PT3 files are concluded with 03TS tag (02TS is used for ordinary Turbosound modules)
VT2 files are capable of handling 3-module by default.

2.6.1

Release of 2.6.1

Latest builds are on https://volutar.myds.me/vortextracker/