rename 'specification file' to 'easyconfig'

fix issues with enforcing lowercase module names (for toolkits)

fix issues with enforcing lowercase module names (for toolkits)

enforce this by making EasyBuild only look for lowercase modules in easyblocks

complete merge of branch to fix build/install of Python with nose,numpy,scipy with goalf toolkit (closes #265)

fix downloading of package sources, don't use --skip-build for numpy/scipy (doesn't work), only unset LDFLAGS if it is set, fix use of rmtree (refs #265)

fix downloading of package sources, don't use --skip-build for numpy/scipy (doesn't work), only unset LDFLAGS if it is set, fix use of rmtree (refs #265)

fix use of options.options to options.avail_spec_params because of renaming of command line option (closes #273)

fix example eb files with respect to building shared libs being disabled by default

Conflicts:
	easybuild/build.py
	easybuild/tools/toolkit.py

add easyconfigs (with required patches) for Intel v11 and v12 compilers toolkits, and for HPL with ictce-4.0.6 toolkit