clean up Boost example easyconfigs, add sanity check wrt MPI functionality in Boost configure function

cosmetic changes to comments, fix typo (parrents), add comment such that PyLint ignores undefined WindowsError in copytree

remove unneccessary overriding of make function, cleaned up duplicate code in make_install, shortened lines in sanity check

improve comments, add FIXMEs for toolkit_comp_family, move stuff that uses os functions into try-except block

use LooseVersion with self.version in version checks, remove hardcoding of 'build' dir, cosmetic changes to comments

Added CGAL and packed-groups to DOLFIN ictce .eb, added debug in modules.py and commented out broken git code (this is fixed upstream)

fixed MPI_INC not being defined in all toolkits, added support for building dolfin with CGAL (and it's dependencies GMP and MPFR)

added support for building dolfin with goalf, fix bug in scotch (we don't need metis things from scotch)

  Boost, CMake, DOLFIN, FFC, FIAT, Instant, PCRE, SWIG, ScientificPython, UFC, UFL and Viper
  metis, ParMETIS, SCOTCH
  These are all building except DOLFIN itself

proper fix for distribute issue with python