fix homepage for skewer

remove buildopts from HDF5 easyconfigs, taken care of by updated HDF5 easyblock now

{tools}[foss/2016b] git v2.13.1

{math}[intel/2017a] numpy 1.13.0

{chem}[foss/2016b] ASE v3.13.0

use PYPI_SOURCE as source URL in Tensorflow easyconfigs

{bio}[goolf/1.7.20] skewer v0.2.2

New Easyconfig for FFmpeg (and dependencies) with the gimkl toolchain

New EasyConfig for the X11 20170129  bundle with the gimkl-2017a toolchain

{lib,math}[intel/2017a] Tensorflow v1.2.0, Keras v2.0.5

{data}[intel/2017a] scikit-learn v0.18.2

{lib,vis}[intel/2017a] Pillow v4.1.1, LibTIFF v4.0.8

{tools}[foss/2016b] pigz v2.3.3

New EasyConfig for PCRE 8.40 with the gimkl-2017a toolchain

New Easyconfig for Doxygen 1.8.13 with the gimkl 2017a toolchain

adding easyconfigs: Tensorflow-1.2.0-intel-2017a-Python-3.6.1.eb, Keras-2.0.5-intel-2017a-Python-3.6.1.eb

bump version to 3.3.1.dev0

{tools}[dummy/dummy] EasyBuild v3.3.0

bump version to 3.3.0 and update release notes

stop using deprecated 2-element tuple format in sources, use equivalent dict format instead