Version 0.3.3

Refactor code
Fix DASH to Audio bug
	When "Clear DASH audio/video files"
	option was enable. Youtube-dlG would
	also remove audio output files
	*.mp3, *.wav, etc..

SignalHandler.py
	Add DataPack class
	Add OutputHandler class

DownloadThread.py
	Now OutputHandler handles the stdout

Reduce user input errors:
 OptionsHandler.py
	Change to int
     --> startTrack, endTrack, maxDownloads, retries

 YoutubeDLInterpreter.py
	Remove empty string check
     --> startTrack, endTrack, maxDownloads, retries

 YoutubeDLGUI.py
	Change wx.TextCtrl to wx.SpinCtrl
     --> startTrack, endTrack, maxDownloads, retries

	Add check_input function for
     --> maxFileSize, minFileSize