[Matlab] Corrected Matlab scripts for the atis

 * load_atis_data : loads raw data files
 * load_atis_aps : loads aps data files and matches integrations start/end
 * atis_snapshot : makes a snapshot of gray level conversions
[yarp/learn_conf_space] New funcionalities

Now learn_conf_space:
 - Draws and image showing the space of posibilities as it is learning it
[yarp/unmask_icub] Error corrected
[utils/feature_tracker_union] New class for creating an union of feature trackers
[components/StreamLogger] BugFix + do not erase existing file until recording is started.

recorder.py and full_recorder.py no longer destroy previous recording with same
name until a new recording is started.
[components/AnalogLogger] New component to log analog outputs to a file
[components/AnalogLogger] Removed forgotten commented code.
[inc/feature_tracker_union] New possibilities for the configuration of the spring

Now we can specify in the constructor how the springs will be configured
[inc/stimulus_grid] New class for displaying a grid of points following affine transformations
[components/stimulus_grid] Modifications for being used with the StreamLogger, and a test application

It also adds the possibility of choosing the shape of the elements of the grid
[components/stimulus_grid.h] Correction of an error
[utils/feature_tracker_union]        Modifications for retrieving the elastic energy with the AnalogLogger, and a test application
[components/feature_tracker_bank]
[matlab] Corrected matlab script for loading subPixEvents.
[components/GaussianBlobTracker] Separate tuning parameters for shape and position
[firmwares/src] Change firmware name for better tracking of versions
[Components/RoiFilter] Use unsigned types for coordinates
[Firmwares] Firmware for ATIS 1.0.1
[lib] Added support for ATIS 1.0.1 in Atis Library
[Firmwares] Clean-up
[components/stimulus_grid] Added the possibility of using rings as elements of the grid, and corrected the display of the bars