Replaced configobj parameters by a simple JSON file

Details suppl.:

Signed-off-by: Christian Tremblay, ing. <christian.tremblay@servisys.com>
Cleaning of unused import and correction of some comments

Details suppl.:

Signed-off-by: Christian Tremblay, ing. <christian.tremblay@servisys.com>
Removed print comments considered as "debug" comment. I just commented them with this code : #DEBUG to be used eventually by a special -debug feature

Details suppl.:

Signed-off-by: Christian Tremblay, ing. <christian.tremblay@servisys.com>
Corrected --init-email option in README.rst

Details suppl.:

Signed-off-by: Christian Tremblay, ing. <christian.tremblay@servisys.com>
Merge pull request #13 from ChristianTremblay/master

JSON format for mail.properties config file