Eigen3 package from Fedora 19
Don't make documentation together with -devel

Documentation should be its own -doc package
We don't need all these prerequisites to build nothing

As long as we don't do `make check`, we don't need all the other
libraries to build the project (it just copies source files)
Use CMake 2.8 to configure Eigen3 on RHEL5
Use URL trick to download source from BitBucket
Use these commands to build with CMake

The %cmake construct does not work with older rpmbuild commands
Add (most of) libraries used by the template code

We don't need these libraries to build the package, but they should
be installed on the user's machine so the library can use them.

The packages that aren't available on RHEL5 is dropped.
Use blas and lapack instead of specifically atlas
Merge pull request #12 from rolk/012_eigen

Build Eigen3 on RHEL5