Eigenface v2.0

You need opencv_world452.dll or opencv_world452d.dll

main.exe - Release version, running more quickly and without debug message output.
main_debug.exe - Debug version, running slowly maybe and with debug message output.

• Fix the wrong feature face output. (But this didn't influence the predict result.)
• Compile the debug version.

Eigenface

依赖opencv_world452.dll