Added custom StyleSheet for GroupBox of the robot window
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Used signal/slot mecanism to update Status Label in the threads.
Added new signal/slot in the header.
Corrected management of the camera size in the remote-serveur in order to always have square pixel.
Merge pull request #192 from DavidMansolino/StatusLabel

Used signal/slot mecanism to update Status Label in the threads.
Merge pull request #193 from DavidMansolino/RemoteCamera

Corrected management of the camera size in the remote-serveur
Used setObjectName(borderedGroupBox) instead of definning the StyleSheet each time.
Merge pull request #191 from DavidMansolino/Borders

Added custom StyleSheet for GroupBox of the robot window