Added logo_url and show_nylas_branding options and ability to turn off Nylas branding#283

ajay-k merged 5 commits intomainnylas/nylas-java:mainfrom

bug-CUST-4479-v-3-java-sdk-missing-logo-and-show-nylas-branding-fields-in-email-template-for-scheduler-configurationnylas/nylas-java:bug-CUST-4479-v-3-java-sdk-missing-logo-and-show-nylas-branding-fields-in-email-template-for-scheduler-configurationCopy head branch name to clipboard