Smaller picture taken to make face recognition more accurate

Pictures taken are now cropped to a more manageable size, to avoid impact of background on face recognition accuracy.

Currently printing all prediction results, as I haven't found one that's more accurate yet.

See merge request !6

Face detection

When a user pressed spacebar, the images from a directory "myfaces" are loaded and read by a FisherFaceRecognizer, and a prediction of the user's identity is made.

See merge request !5

Made some improvements - looks like there's an issue training the FaceRecognizer - might not be reading images correctly

Hard-coded to read the first two subdirectories of a myfaces directory and add any pictures to the FaceRecognizer

Saving features

Saving an image puts the title on the image.

See merge request !4

Added overlay with control options

We decided not to use a countdown before the picture is taken, as this seems like more of an annoyance than a feature.

See merge request !3

Save image

The directory was the problem. Changed to "./name_of_pic" to denote current directory.

See merge request !2

Added ability to take a picture from a webcam

Right now I just have a main method in FacialRec that is doing this.

Current functionality:
* When run, starts a video feed from the webcam
* If user presses spacebar, takes a picture and displays it
  * If user presses ESC or spacebar, return to video feed
* If user presses ESC, exit application

We might want to divide some of this into classes. Let me know what you think.

See merge request !1