Adds support to Awesome Enterprise for sending emails, SMS, and push notifications using various third-party API

• Improved: Added support for Amazon SES APIs to send emails with attachments.

• Fixed: Removed the direct dependency of WP function so that we can use them in non-wp requests as well.
• Fixed: Added missing Tracking info for SendGrid

• Fixed: Added option to specify the template for msg91 sms.

• Fixed: Android Push Notification.

• Improved: Switched to Sendgrid V3 API

• Fixed: Class 'SendGrid' not found

• Initial release