Native version on SLES11 SP4 is too old

The QR decomposition test program can now called with parameters for
matrix size, nev, and block size.
This closses issue #20

- Do not leak "ik", "rk", ..., parameters to use namespace
- Change required ELPA version on configure.ac of test_project

Michael Bankd (debian) provided a patch, which allows
to run the qr-decomposition test programs with smaller matrices, and
thus allows testing in reasonable time on limited hardware (e.g. arm
devices)

In order to make the patch work, also Makefile.am was updated

Apparently with "-check all" some versions of the Intel compiler
complain about the use of

  C_SIZEOF(a(1,1,1))

and similar, when a is not already allocated.

Now this is done consistently both in autoconf and automake. One can now
safely call make clean and the header files are re-generated
automatically.

In my humble opinion it is much more obvious to specify

  --with-mpi=no

instead of

  --enable-shared-memory-only

to configure without MPI

This should make it easier to compile ELPA for Debian/Ubuntu, now it
should be sufficient to just

  ./configure

without a need to set LIBS or SCALAPACK_LDFLAGS