Add GyroGuide extension

In neurosurgery, it is essential to determine the trajectory angle and
depth. Furthermore, the angle and depth have to be transmitted to the
probe for real time navigation. This extension implements these
functions. First, it calculates the entering angle and depth between the
probe and the reference planes based on CT/MRI scan. Then, the
calculated parameters can be transmitted to a gyroscope-based device
which is attached to the probe. The surgeons can be guided to operate
precisely by matching the output of gyroscope with the calculated angle,
and comparing the scale on the probe and the calculated depth.
Modify iconurl

Modify iconurl from
http://www.slicer.org/slicerWiki/index.php/File:GyroGuide.png
to
http://www.slicer.org/slicerWiki/images/a/a7/GyroGuide.png
Update TCIA Browser
Merge pull request #593 from mehrtash/update-TCIABrowser

Update TCIA Browser
Merge pull request #579 from lpfang/add-GyroGuide

Add GyroGuide extension
fixing mac cmake error
Merge pull request #594 from ikolesov/update-CarreraSlice

fixing mac cmake error
ENH: Update DTIAtlasFiberAnalyzer from r130 to r131

ENH: Remove unecessary includes in the CMakeLists files to shorten the compilation command lines which were creating issues when being compiled as an extension
http://www.nitrc.org/plugins/scmsvn/viewcvs.php?view=rev&root=dti_tract_stat&revision=131
Merge pull request #595 from fbudin69500/update-DTIAtlasFiberAnalyzer

ENH: Update DTIAtlasFiberAnalyzer from r130 to r131