Modified TestSend in sendgrid_test.go to check return value of Send
Modified TestSend in sendgrid_test.go to check return value of Send

karmakaze/sendgrid-go,VividCortex/sendgrid-go,ChannelMeter/sendgrid-go,karmakaze/sendgrid-go,VividCortex/sendgrid-go,sendgrid/sendgrid-go,sendgrid/sendgrid-go