ignore boost directory and tarball, and build directory

Functions implementing the Transformation Diffusion Reconstruction fr…

…om	Casero2017 MIA paper.

Master branch used for casero2015_3d_histology_diffusion_registration…

… experiments

	* release 0.10.0.

	- Build works for Linux and Windows.

	* release 0.11.0

	- Fixed some issues with MEX functions failing on Windows because
	the DLLs they linked to (CGAL, GMP, MPFR) where not visible. That
	has been fixed by adding code to add_gerardus_paths.m, so that the
	DLL directories are added from Matlab to the system path in
	Windows. This realease has been tested to work on Windows.

	* release 0.9.0:

	- Gerardus now builds on Linux and Windows, 64 bit.

	* release-0.8.2

	- Tag a version of the current project before making
	substantial changes by updating CGAL to v4.2.

	- Not all the project is working, as there seems to be a bug in
	CGAL 2.0.4 in tree.closest_point_and_primitive() that returns the
	wrong facet.

	* release-0.8.1

	- Last version that was compiled with ITK v4.2.

	* release 0.8.0

	- Quite a bit of code added since the last release. This release
	works in a fresh linux install. This version intentionally doesn't
	let the user build in Windows, because we don't have a way to
	build GMP and MPFR for Windows yet.

	* release 0.7.0.

	- CMake build system now builds and installs all the command-line
	programs and MEX files in the project. Some had been forgotten,
	after I compiled them by hand from Matlab. But now, everything can
	be compiled from the root CMakeLists.txt.

	- Compilation and build tested for

		Linux 64 bit, gcc 4.6.1, CMake 2.8, ITK 3.20.1,
		Matlab R2011b, Boost 1.46

		Windows 32 bit, Visual Studio 9 (2008), CMake 2.8,
		ITK 3.20.1, Matlab R2008a, Boost 1.47