Support for building/installing FSL

Conflicts:
	easybuild/build.py

add support for specifying directory to apply patch in (required for e.g. OpenFOAM)

clean up recursively determining dependencies, fix bug when depth was set to 0 (which resulted in infinite recursion)

only prepare for direct member module of a toolkit , not for implicit dependencies (like icc/ifort for imkl);
add BLACS as explicit dependency for goalf toolkit in example easyconfig

re-add import required for VERBOSE_VERSION, ignore PyDev warning on use of FileRepository in EasyBuild config (config is exec'ed, so it works)

add support for specifying directory to apply patch in (required for e.g. OpenFOAM)

pbs job convenience

clean up recursively determining dependencies, fix bug when depth was set to 0 (which resulted in infinite recursion)