INSTALL.rst: update required versions

INSTALL.rst

@@ -21,7 +21,7 @@ Prerequisites
 Building Kwant requires
  * `Python <https://www.python.org>`_ 3.4 or above (Kwant 1.1 is the last
    version to support Python 2),
- * `SciPy <http://scipy.org>`_ 0.9 or newer,
+ * `SciPy <http://scipy.org>`_ 0.11 or newer,
  * `LAPACK <http://netlib.org/lapack/>`_ and `BLAS <http://netlib.org/blas/>`_,
    (For best performance we recommend the free `OpenBLAS
    <http://www.openblas.net/>`_ or the nonfree `MKL
@@ -32,7 +32,7 @@ Building Kwant requires
    C++.
 
 The following software is highly recommended though not strictly required:
- * `matplotlib <http://matplotlib.org/>`_ 1.1 or newer, for Kwant's
+ * `matplotlib <http://matplotlib.org/>`_ 1.2 or newer, for Kwant's
    plotting module and the tutorial,
  * `MUMPS <http://graal.ens-lyon.fr/MUMPS/>`_, a sparse linear algebra library
    that will in many cases speed up Kwant several times and reduce the memory

[Joseph Weston]

@cwg What is this? Where have these numbers come from? We do not test against versions of scipy/matplotlib this old, and both of these versions are older than is in ubuntu 14.04 and debian stable. In #63 (closed) you imply that we should support these two platforms, but nowhere are scipy 0.11 and matplotlib 1.2 mentioned.

[Christoph Groth]

The only purpose of this commit is to sync INSTALL.rst with the current setup.py.