determine toolkit dependencies based on module file instead of loaded modules, add support for this (show, dependencies_for) in tools/modules.py (closes #245)

determine toolkit dependencies based on module file instead of loaded modules, add support for this (show, dependencies_for) in tools/modules.py

fix moduleclass in example .eb spec files, shorten ATLAS description, add custom sanity check paths for OpenMPI (refs #108)

fix moduleclass in example .eb spec files, shorten ATLAS description, add custom sanity check paths for OpenMPI

make sure all easyblocks paths (which are listed in PYTHONPATH) are checked when trying to find an easyblock (refs #246)

make sure all easyblocks paths (which are listed in PYTHONPATH) are checked when trying to find an easyblock (refs #246)

ement easyblock for HPL (based on old HPCC easybuild support), and add example .eb spec file for HPL to easyconfigs (refs #108)

implement easyblock for HPL (based on old HPCC easybuild support), and add example .eb spec file for HPL to easyconfigs (refs #108)

fixed detection of toolkit dependencies by also taking previously loaded modules into account (refs #245)

implemented by refactoring and extending tools/toolkit.py and added loaded_modules function to tools/modules.py
tested with goalf toolkit (refs #103)

Conflicts:
	easybuild/framework/application.py

add easyblock for compiler toolkits (Toolkit), add example .eb spec file for goalf toolkit, i.e. version 1.1.0 (GCC 4.6.3, OpenMPI 1.4.5, ATLAS 3.8.4, LAPACK 3.4.0, FFTW 3.3.1 and ScaLAPACK 1.8.0 (with BLACS 1.1)

also add example .eb spec files for versions 1.8.0 and 2.0.1 with GCC 4.6.3, etc

revert using external function for determining MPI library specific stuff, can't be used for ScaLAPACK anyway

refactor out get_mpilib_specifics function in BLACS easyblock, because it can also be used in ScaLAPACK

added easyconfigs for FFTW, LAPACK and ATLAS

implemented easyblock for ATLAS, which allows ignoring CPU throttling check and building against netlib's LAPACK to make ATLAS provide a full LAPACK lib; building shared libs is optional
also added example .eb spec files and two important patches (fix make install for shared libs, fix illegal instruction error)

add cleaned-up and tested easyblock for LAPACK, and example .eb in easyconfigs for building LAPACK without BLAS, with ATLAS as BLAS lib, and in test_only mode (for e.g. testing BLAS and LAPACK libs after building ATLAS with LAPACK provided)

add .eb spec file for FFTW 3.3.1 built with GCC 4.6.3 and OpenMPI 1.4.5 (without OFED support) to easyconfigs

Removed dependency on setuptools by using extend_path for namespace packages instead of pkg_resources.declare_namespace