add quotes around setenv definitions in modulefiles & define authors as per issue easyblocks/#99

So,

hopefully this is a fix for the bug affecting EBDEVEL* modulefiles, described in issue #457;
i have done a couple of tests -went fine- with the original cases that manifested the error, but nothing too extreme, so better play cautious. Consider a full regression test necessary before merging to master or such, but my guess is that it is good enough for develop.

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>