RES-957: Addes new documentation pages
RES-957: Fixes CR
RES-957: fixes CR issues
RES-1294: Deprecates Retrieve Usage calls in Reseller API
RES-1297: Customer statistics
RES-1297: updates documentation
RES-1297: fixed merge conflicts
RES-1297: update Reseller API subuser account limits
RES-1297-customer_subuser_unsubscribes
RES-1297-customer_unsubscribes
RES-1297: fixes subuser apps api
Add new PHP library

sendgrid-report-php
RES-1297: update customer_subuser_automatic_login
RES-1297: Fixed reseller api: invalid emails, spam reports, pending account changes
RES-1297: Fixed issues from Travis CI
RES-1297: customer pending account changes
RES-1297: fix invalid json
RES-1297: Fixed json
RES-1297: fix json
RES-1297: Merged with daniela, laur and efi