First Version of PreviewPhotoTaker.

First, the user has to give the name of the object, that will be photographed. This name will be the name of the folder, where the taken images will be stored in the "PhotosForResearch" folder on the SD-card. The image names are numbers, they are always stored in ascending order.
If the user touches the preview, the preview image will be saved.
.csv file writer and photographed objects history added.

Landscape menu added.
History of photographed objects bug fixed.
PC application for testing the detectors.
First version of the C++ detector tester.

It supports only cascade classifier, further it will be extended.
It reads the given test images, runs the detector and saves the marked images.
Extended with possibility of detector comparison.
Basic statistics added, result shown in console.
Supporting comparison of 4 detectors (easily extendable ).
Writing results into a .csv file.
Automated photo taking added and .csv writer updated to info-file writer.
Bugs fixed.
Canny tools added, Detectors class renamed to DetectorTester.
Code duplication eliminated with inheritance.
Merge branch 'PreviewPhotoTaker' into Cpp_DetectorTester