A few kernels could not be used together with OpenMP:
an interface error prohibited the compilation.

Removed a forgotten C-preprocessor error flag.
Futhermore, describe in the documentation why at the moment a
build of Bluegene P/Q kernels and OpenMP is not allowed.

Automake does normally not understand the dependencies of Fortran 90
modules, thus a parallel build will almost certainly fail.

As in ELPA 2011.12.002, the ELPA_development_version_qr  now
includes scripts from the fdep project (see git.schokokeks.org/fdep)
which cirumvents this problem.

Thanks to Lorenz Huedepohl, now a parallel build works.

- updated INSTALL documentation
- improved description of kernels src/elpa2_kernels/README_elpa2_kernels.txt
- improved OpenMP builds:
   * usage of OpenMP can now be specified with
     "--enable-openmp" or "--with-openmp"
- improved checks for AVX build (identical to ELPA 2013.08.003):
   * if AVX kernels are specified AVX compilation is tested
   * the option "--with-avx-optimization" automatically updates
     CFLAGS and CXXFLAGS with optimization flags

This is the release of the ELPA_development_version_OpenMP
If OpenMP support is not used, this version has the same
functionality as ELPA_2013.08.

If OpenMP support is used, obviously, a hybrid version of ELPA will be
build.

Allthough this is a release, version ELPA_2013.11 is far from complete!
During the next week optimizations of the OpenMP part will be published,
however, the basic functionality is set by this commit