add support for DOLFIN

Conflicts:
	easybuild/build.py

update README file with contact info + fix links

don't use zlib as dependency for Boost or DOLFIN, this currently breaks the PETSc build (see issue #108); specify 'zlib-devel' as osdependency instead

support multiple sanity check commands, run both Python and C++ version of DOLFIN demos as sanity check commands

only check easyconfig filename against module it provided in resolveDepencies

fix easyblock specification in easyconfig files according to new class name encoding scheme (see #86)

add support for creating a dependency graph based on easyconfig files

Conflicts:
	easybuild/tools/filetools.py

86 encoding scheme

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>

run DOLFIN demos as a single sanity check command (took about 8 minutes on my laptop); running them as tests turned out to require too much fiddling around with getting the PYTHONPATH right