Move rereadDICOMFile() to readDICOMFile() and update all man pages.
Profiled R code and made some minor changes to (hopefully) increase speed.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rigorous@330 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Comment from Jo Etzel = path names are not parsed in some operating systems
In readNIfTI() the parsing of path names separates the path from the file name

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rigorous@331 edb9625f-4e0d-4859-8d74-9fd3b1da38cb