Create Clockworksms plugin; Implement in several mail sending calls - refs #7225
Merge branch '1.9.x' of https://github.com/chamilo/chamilo-lms into 1.9.x_clockworksms
Minor Cleaned code
Merge branch '1.9.x_clockworksms' of github.com:ilosada/chamilo-lms into ilosada-1.9.x_clockworksms
Remove useless files in clockworks plugin - refs #7225