Add more verbose information when using flycap driver

Video mode and frame rate used to be displayed as a number (enum)

Now previously defined array with pairs of enum values and strings allows to display string instead of int:
- Added three different arrays with type conservation has been defined
- Added an overloaded function fc2_vals_gen that returns a vector with pairs corresponding to a enum type
- Added a new function fc2_defnum2str to retrieve string from enum input has been added
- Modified the function fc2_defstr2num to use std::vector
Add Triclops support for Linux

Some introduced changes:
- Added new module cmakemodules/script_triclops.cmake for searching Triclops in Linux
- Changes to CMakeLists to add new module and link libraries
- Added new #define MRPT_HAS_TRICLOPS
- Minor fix to Flycapture2 name and path search hints in Linux
Add Triclops functions to control Bumblebee2 in Linux

Changes committed:
- Added .ini options for stereo mode control: stereo_mode, get_rectified, rect_width, rect_height
- Added new flycap member variables for storing intrinsic calibration: baseline and intrinsic matrix parameters
- In CImageGrabber_FlyCapture2::open added stereo_mode option to configure camera grabbing with Triclops
- Added new method overloading CImageGrabber_FlyCapture2::getObservation for retrieving stereo observations through Triclops library
- In CCameraSensor::getNextFrame stereo mode is now checked through new method CImageGrabber_FlyCapture2::isStereo(),
and then returns CObservationImage if false or CObservationStereoImages if true
- Minor fix to PGR types conversion tables for adding FORMAT7 recognition in verbose
Module for adding Triclops libraries
Fix bug with trigger mode

Previous:
When trigger mode was enabled, and later disabled, it keeped enabled and the camera had to be accesed from other application such as Flycap2 or Coriander to set again Trigger off.

Now:
The value of trigger_enabled is always assigned to the camera configuration
Fix errors when compiling mrpt-hwdrivers without Triclops libraries
Merge pull request #72 from jesusbriales/bumblebeeLIN

Bumblebee2 support in Linux