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

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
split authors at one per line rate

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
move quote_str and any functions to tools/utilities module
better error message
use quote_str function in set_environment function
fix unit tests and extend them a bit
Merge pull request #3 from boegel/457_fix_EBDEVEL_modulefiles

use quote_str function in set_environment - fixes issue with develop modules
Merge pull request #458 from fgeorgatos/457_fix_EBDEVEL_modulefiles

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