Revert "convert to camelcase for readability and add godoc"
Revert "convert to camelcase for readability and add godoc"

This reverts commit 8730e8523adb2f0480107f594ce08a24fef701d3.

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