Updated wedge coordinates to used neater version of code

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/retistruct@1272 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Added documentation for wedge conversions

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/retistruct@1273 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Added output of wedge coordinates to matlab

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/retistruct@1274 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Documentation tweaks.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/retistruct@1275 edb9625f-4e0d-4859-8d74-9fd3b1da38cb