Construct the database

[lorenzoPatras]

First version of db should contain 5 gestures (raise left hand, raise right hand, raise both hands, squat, jumping jack), 10 samples for each of the 5 gestures and 3 samples for test. For each of the 5 gestures, there will be a sample a normal speed, one faster and one slower.

[lorenzoPatras]

Added 4 gestures: right hand raise, left hand raise, both hands raise, squat; 7 samples in db and 3 samples for test: one at normal speed, one fast and one slow.