Use unwanted env functionality to unset MKLROOT
impi 3.x only includes include/mpi.mod
fix typo
Merge branch 'develop' into impi3
always include -w flag for preprocessor to supress warnings that may break configure
link with multithreaded LAPACK libs for ESMF
Add Easyblock for CHARMM
removed a check on always having a python module available, just having pylibdir set is fine
added the version independend python package
CP2K: updated easyblock to version 20131205

Also did some indenting cleanup.
added check for _ctypes, this should always be available
fixed docstring
Merge branch 'develop' into impi3
fix silent.cfg support for installing recent Intel tools
fix icc/ifort sanity check for 2013_sp1 versions
always override install path for recent impi versions
fix support for building FFTW wrappers for recent imkl versions
fix imkl sanity check for recent version + style fixes
impi 4.1.2 requires specifying full install path again >_<
fix typo