Merge branch 'develop' into dlpolyplumed

* develop: (650 commits)
  fixed typo
  switch to use %(perlver)s and %(perlshortver)s templates
  style fixes
  fix GLib sanity check
  Forgotten easyconfig for pkg-config
  Add PLUMED 2.1.4 and 2.21 for intel & foss 2015b
  add easyconfig METIS-5.1.0-foss-2016a-32bitIDX.eb
  Fix sanity check for libffi
  Plumed 2.2 with intel/2015b
  libmatheval 1.1.11 with intel/2015b
  modify easyconfig OpenFOAM-3.0.0-foss-2016a.eb
  modify easyconfig OpenFOAM-3.0.0-foss-2016a.eb
  add easyconfig CMake-3.4.3-foss-2016a.eb
  modify easyconfig CMake-3.4.3-foss-2016a.eb
  modify easyconfig CMake-3.4.3-foss-2016a.eb
  add easyconfig METIS-5.1.0-foss-2016a.eb
  add easyconfig SCOTCH-6.0.4-foss-2016a.eb
  Update naming of GTK+, PyCairo and Gdk-Pixbuf
  add easyconfig SCOTCH-6.0.4-foss-2016a.eb
  add easyconfig METIS-5.1.0-foss-2016a.eb
  ...