Pyscipkg

Added openblas package built from a regular release and updated numpy to use this package.
The openblas backage was built with the optimized lapack included so therfore the lapack
package is not needed by numpy.

I addition the following packages where added with dependency:
 * scipy
 * matplotlib
 * cython

Note:
- The test suite for numpy and scipy does only partly run. Therefore the automatic checks in
   scipy is removed.
- matplotlib is dependent on python-cairo. For python3 this feature is removed due to python-cairo is broken.
  Saving of plots to images, pdf etc is therfore not available in python3.
  As an alternative the cairocffi can be used as a drop-in replacement for pycairo. However I was not
  able to build cairocffi yet.
Replace with "makedepends" and add python2 too.