DOC: update minimal matplotlib requirement.
Use version from Ubuntu 14.04 as for our other dependencies.
@@ -53,7 +53,7 @@ scikit-learn requires:
- NumPy (>= 1.8.2)
- SciPy (>= 0.13.3)
-For running the examples Matplotlib >= 1.1.1 is required.
+For running the examples Matplotlib >= 1.3.1 is required.
scikit-learn also uses CBLAS, the C interface to the Basic Linear Algebra
Subprograms library. scikit-learn comes with a reference implementation, but
