MRView: initial work on ROI tool
MRView: initial work on ROI tool
Merge branch 'ROI_tool' of gitlab.com:mrtrix/mrtrix3 into ROI_tool

Conflicts:
	src/gui/mrview/tool/roi_analysis.cpp
	src/gui/mrview/tool/roi_analysis.h
DWI::SDeconv: support direct response function input as vector of coefs

Allows the response function coefficients to be provided as a list of
comma-separated values, or as a file. The application will try to parse
the list as a vector a values first, and load the file if that fails.
DWI::Shells: update to option documentation
Merge branch 'master' into ROI_tool
MRView: fix colourbar display for fixed colour mapping
Merge remote-tracking branch 'github/master' into ROI_tool
Merge branch 'master' into ROI_tool
Merge branch 'master' into ROI_tool
Merge branch 'master' into ROI_tool
MRView: add icons for ROI tool
Merge branch 'C++11' into ROI_tool
MRView: split off image handling from rendering

Refactoring of MRView::Image to break off image rendering from image
file handling. There is a new MRView::Volume class to deal with the
texture handling and rendering, which MRView::Image now derives from.
The reason for this is to simplify the implementation of the ROI tool.
MRView: ROI tool now uses new Volume class
MRView: ROI tool can now load and display ROIs
Merge branch 'C++11' into ROI_tool
Image::Stride: further fix to sanitise() and contiguous_along_axis()
Merge branch 'C++11' into ROI_tool

Conflicts:
	lib/image/stride.cpp
	lib/image/stride.h
MRView: added callbacks for Tools to grab focus & handle mouse events