Make dc1394 camera driver more verbose and avoid wrong video mode

Possible values for camera features (shutter, gain, exposure) are set from .ini file but their possible range is unknown
When an unavailable video mode is set for a camera two situations can happen:
1. Camera works but without our chosen parameters
2. Camera freezes in dc1394_capture_dequeue in getObservation due to DC1394_CAPTURE_POLICY_WAIT

When initializing dc1394 driver in terminal more information is shown:
- Video modes supported and current mode selected
- Features configuration at run-time moment and possible values range
Video mode is checked to assure that it is valid for current camera
Merge pull request #69 from jesusbriales/dc1394verbose

Make dc1394 camera driver more verbose and avoid wrong video mode