sofa: Fix aux build directory in configure file
vtk: Need to explicitly state we are using X11 OpenGL

For a while now OS X vtk has been attempting to use the native
Framework regardless of the Cocoa/X11 setting. It was working because
X11 OpenGL was picked up by default anyhow.

Not tested on Linux (where it was presumably working fine without
any fiddling) so not sure if this patch should only be enabled
on OS X.
ast: Bump the release number to 8.0.1

This is for Bill Joye who wants to use the XPH projection support in the
current version.
ast: Prepare for a new version (v8.0.2)
gaia: Teach GAIA where Apple X11 might live
vtk: Trick VTK into searching for X11 when looking for Tk
cmake: Update to cmake 3.0.2
tlcsys: Update Tcl/Tk to v8.5.16
ast: Split off new astAppendString stuff to a new routine
kappa: Use new astAppendStringf instead of astAppendString
vtk: Only modify GL search path if X11 has special needs

On linux AC_PATH_X doesn't bother setting any values because
X11 is in the default compiler paths.
pal: Add palPolmo
itk: Somehow I had missed this OS X Yosemite X11 patch
Revert "ast: Fix EXTRA_DIST pal confusion"

This reverts commit 7d544f93799986be90c7d2bc1e03252fc88f779c
since it caused each subdirectory to end up a level too deep
(e.g. all the pal files were in pal/pal/ rather than just pal/).
ast: Rename pal.c to avoid confusion with EXTRA_DIST

See also commit 6d80f16793 and 7d544f937999
ast: Fix ast testers so that they work on Ubuntu

Need to take account of LDFLAGS="-Wl,--no-as-needed"  if set.
pubs: Fellwalker - we do not compare FellWalker with other types of algorithms

The referee wanted some discussion of other algorithms.
pubs: Fellwalker - referee sees little difference between fig.s 5 and 6
pubs: FellWalker - referee wants "total data sum" explained
pubs: FellWalker - referee wants "STC-S" explained.