-removed dependency of reg1.* on cholesky.* since this is now done with EIGEN (remove about 150 lines of code from our codebase)
-removed cholesky.h and cholesky.cpp 
-added some consts to functions in reg1.*
-removed some whitespace in reg1.cpp

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/genabel@1700 edb9625f-4e0d-4859-8d74-9fd3b1da38cb