Added a tiny app to create and manipulate  a database used to store face-recognition results

- Due to the fact that cmake >= 2.8.11 provides the nicest way of
including Qt5, this app requires 2.8.11 as a minimum version.
- frDbTool can now import images and scores from multipie experiments

- Added a reset() method to FileListImageSource. Should move that to
ImageSource interface later.
Added a new app, frDbExp, to do face recognition experiments on the database
- frDbExp: Replaced the whole matlab-script-writing with just ascii output
Changed CMakeLists to minimum working one
Merge remote-tracking branch 'origin/eladevnew' into refact