Adding better error messaging when camera API causes a crash on launch

[alifuaziz]

When the camera SDK tries to open with camera settings that are not valid (i.e. the FPS is being set to a value that is too high), the application simply crashes instead of raising an good error message.

This is confusing to the user as they won't know why it is happening.

A dialog box should be added to display the error message that has causes the crash.

Adding documentation for handling this behaviour is also important.

[alifuaziz]

A dialog box has been added, however handling, gracefully, (i.e. by setting the framerate of the camera to the max viable one) has not been implemented.