Import files from external working dir

These are the scripts used to do the D''
topotaxy work.
Update comments for topotaxy example
Update relase notes for this branch
Merge pull request #11 from andreww/topotaxy_example

Topotaxy example
Merge branch 'splitting' of ssh://majorite/geophysics/walker/git-repos/msat into splitting
Added optional weight output to split_misfit. Still need to implement something
useful for this.
Added a basic demo for the splitting misfit calculation. This is still a work
in progress.
* Improvements to splitting misfit calculations.
- Added 'split intensity' misfit mode, and documented.
- Removed the option to return a weight (this wasn't used by any
  of the codes.)
Minor comment fixes
* Added a code to demonstrate the different misfit functions implemented
  in MS_split_misfit.m.
* Improvements to splitting misfit demo.

- Added several source polarisations to demonstrate the effect of
  this on misfit functions.

- Tidied up the code.
* Added tests for the new options in MS_splitting_misfit.

- Two simple tests have been added for the 'intensity' and
  'simple' modes available to MS_splitting_misfit.
* Data overlays in MS_sphere.

- Added functionality to MS_sphere to allow P-wave velocity data to
  be overlayed on the sphere.
* Data overlay in MS_sphere.

- Added shear-wave splitting data overlay in MS_sphere.
Merge branch 'splitting' of ssh://majorite/geophysics/walker/git-repos/msat into splitting
* Splitting misfit example.

- Added decent comments to the misfit example.
* Splitting misfit example

- Added a new example script to demonstrate using MS_splitting_misfit
  to invert splitting data for the orientation of a TTI medium.