update AutoHotkey to 1.1.16.04

* AutoHotkey 1.1.16.04
* AutoHotkey x64 1.1.16.04
* Ahk2Exe 1.1.16.04
* AutoHotkeyHelp 1.1.16.04
* new SciTE4Ahk icon
* preserve SciTE4Ahk directory