clean up example goalf easyconfig for SuiteSparse, add example easyconfig for ictce, get rid of patch file and patch in easyblock using fileinput, fix creating of symlinks

changed ParMETIS to not derive from METIS but directly from Application, didn't make much sense; cleaned up example easyconfig for ParMETIS and added one for an older version of ParMETIS

minor cleanup of FIAT and ScientificPython example easyconfigs, add example easyconfigs for ictce toolkit

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