Removed the option to compile ProbABEL without EIGEN from the configure.ac and the Makefile.am files.

Checked that ./configure --with-eigen-include-path= still works.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/genabel@1694 edb9625f-4e0d-4859-8d74-9fd3b1da38cb