v2.17 Release

Changelog

• Added methods add/remove firewall for droplets #91 @mashurex
• Adapt new changes or enhancements of DO v2 APIs #89 @jeevatkm
  • Added Let's Encrypt create certificate method and options
  • Added filesystem_type, filesystem_label, tags attributes support to volume - 1, 2
  • Removed the IP address validation
  • Added last_tagged_uri attribute and deprecated last_tagged attribute - Tags
  • Added new create custom image API support
• Bug fix: Add expose annotation to sources #90 @mcjp78
• Bug fix: Updated the size attribute in the Volume to integer #92 @bahrinka