style cleanup for PythonPackage class and example easyconfigs for FFC, FIAT, Instant, Jinja2, ScientificPython, UFL, Viper

add example easyconfig for Sphinx (DOLFIN dependency), along for its dependencies Docutils, Jinja2 and setuptools

remove Python as direct dependency for PETSc

copy include files for ScaLAPACK;
define env vars for ScaLAPACK and FFTW
add UFconfig dir to CPATH in SuiteSparse
add patch file for outdated PETSc/SLEPc stuff in DOLFIN

Conflicts:
	easybuild/easyblocks/s/scalapack.py

Conflicts:
	easybuild/tools/build_log.py

self.tk doesn't exist