initial version.
 add testing template
add function to parse file name suffix from given string;
 minor improvements;
 read image files .. and settings sizers ..
imageviewer and meshviewer
improvements;
compatibility problem fix in win32;
window icon added;
add png image as application icon;
convert .png to .ico as application icon
add resource file for windows;
add navigation feature;
enable drag and drop in files into MainWindow;
add zooming (in/out) feature;
add resource files;
bug fix;
refactoring;
improved project configure
add libpng and libjpeg dependency;