stick to matplotlib 1.5.1 in scikit-learn, for compatibility with other Python modules

make sure EasyBuild is in full control over optimization flags in Blender easyconfig

{bio}[intel/2016b] SimVascular v2.16.0406

{lib,vis}[intel/2016b] POV-Ray v3.7.0.0, SDL2 v2.0.4

{vis}[intel/2016b] Blender v2.77a, OpenImageIO v1.6.17, OpenEXR v2.2.0

add easyconfig Blender-2.77a-intel-2016b-Python-3.5.2.eb, add easyconfig OpenImageIO-1.6.17-intel-2016b.eb, add easyconfig OpenEXR-2.2.0-intel-2016b.eb

has been added as an extra dependency compared to the intel
2016a toolchain.

{vis}[intel/2016b] PIL v1.1.7

Add libreadline dep to Lua for static build

{math}[dummy/] MATLAB v2016a

if available.