added arb easyblock
fix remarks for ARB easyblock
use pass for configure, build with make after setting env vars and make options
correct use of os.pathsep.join
run make to configure before actually building, ignore exit code
really ignore exit code of make to configure
correct tweaking of PATH and LD_LIBRARY_PATH
define self.subdir, since we can use absolute paths in make_module_req_guess
add debug logging for 'make' to configure
Merge pull request #291 from boegel/arb

add (cleaned up) easyblock for ARB