Add a change ini file dialog

Add exit and about
Add .ini file and ChangeDlg for users to control parameters —— CompressionRatio & MinTargetArea:

1. Add get from my.ini in VideoSeg.cpp, Initial part;
2. Show info from my.ini in Initialize of ChangeIniFileDlg;
3. OnClickedSave: if( SetTextA != get Ini String)  WriteIniString.