AfricasTalkingGateway files added
AfricasTalkingGateway files added

SMS Gateway class added to the project

yoda-yoda/aiesec-quiz-engine,denisKaranja/aiesec-quiz-engine,yoda-yoda/aiesec-quiz-engine,yoda-yoda/aiesec-quiz-engine,denisKaranja/aiesec-quiz-engine,denisKaranja/aiesec-quiz-engine