created 2013.02 release

dropped old rank-2 QR-decomposition (blockedQR.f90)

    at runtime.

    If no input file is supplied when running any of the test* programs, the
    programs run with compiled-in default values as before.

    Optionally, a file 'test_parameters.in' can be supplied. In that case,
    each test* program checks for valid replacement parameters in the following format

    na 7000
    nev 3000
    nblk 32

    where:
    - the order of lines does not matter
    - any, all or none of the specified lines need be present
    - na is the marix dimension for which the test is run
    - nev is the number of desired eigenvalue/eigenvector pairs
    - nblk is the algorithmic block size, usually a relatively small number
      16, 32, 64 . Unreasonable values should be avoied, please check first.

Added OpenMP enhancements to elpa2.f90
Removed MPI-2 dependencies, ELPA should now work with pure MPI-1
Added x86_64 optimized assembler version of the kernels.
Added a straight forward and simple version of the kernels.
Added a description of the kernels.

Blocked QR-decomposition (rank-2 version) added. The new QR-decomposition is used per default. If you want to use the standard QR-decomposition set which_qr_decomposition = 0.

We have taken the unusual (one-time) step to modify the structure
of the ELPA git repository as follows:

1) The current ELPA version has been designated as a "stable"
   version. It has proven to be rock solid for us so far, and
   deserves this name.

2) We have decided on a stable version naming scheme,
   "ELPA_year.month". The first such version is
   ELPA_2011.12. This version will only ever be updated
   for clear and unambiguous bug fixes.

3) All further development will happen in the directory named
   ELPA_development_version. At this time, ELPA_2011.12 is an
   exact copy of ELPA_development_version.

No substantial changes have been made to either repository as yet.
(But we are happy to say that the present "ELPA" publication, which
we hope ELPA users will cite, now has its final volume and page
numbers.)

We apologize if this change causes any inconvenience for you. Please
try to make sure that any changes you might make really affect the
development version, and not the stable version. We do not plan any
structural changes of a similar scope at any point in the future,
but it had to be done once.

Happy ELPA stable version day!