Vruiintegration

link vrui1.0-068 to the Cave_fibers Project
add pkgconfig folder for ling cmake the the librairy
add a README file for the installation step
add glew dependencies
add the fiberapplication that implement vrui::application

For building the project fallow this step:
Building on linux utilizes cmake and make.

STEP 1 Install Vrui lib
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- Download the VRUI librairy from http://idav.ucdavis.edu/~okreylos/ResDev/Vrui/Download.html (take the version 1.0-068)
- Untar in a local directory
	% tar -zxf Vrui-1.0-068.tar.gz 
    % cd Vrui-1.0-068
- In the makefile set INSTALLDIR to "/opt/VR/Vrui-1.0-068" 
- Fix a bug in VRDeviceDaemon/VRDeviceManager.cpp
	Change: "if(trackerReportMask==fullTrackerReportMask)" to "if(trackerReportMask != 0)"
- compile with make
- install with sudo make install

STEP 2 Build Cave_Fiber
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The project should be built in the "build" directory. Assuming 
the currect working directory to be project's main directory, 
the following steps should do the trick:

> cd build
> PKG_CONFIG_PATH=../pkgconfig/ ccmake ../
The PKG_CONFIG_PATH is for link cmake to the Vrui librairy.
PRESS 'c' for configuration
Specify the VRUI include Folder. Probably /opt/VR/Vrui-1.0-068/include
PRESS 'c' again for further configuration
PRESS 'g' to generate the build system including the Makefiles.
> make

For the moment the poossibility to choose a file are not implemented. 
Copy a .fib file to the build folder. The file name are fibers.fib, 
you can change it in src/fiberapplication.cpp:  
	change: std::string fileName = "fibers.fib"; to std::string fileName = "'filepath'.fib"


Now the "build" directory should contain an executable named Cave_Fibers.
Inside "build" the program can be started with the following command:

> ./Cave_Fibers