Initial import
Add gemspec
Remove gemspec with old name
Change the name of the gem to something we can use without conflict
Add documentation blocks to each API call
Fix syntax error for Ruby 1.9.x
Messages with multiple recipients can now specify unique metadata for each recipient
/rejects/list now optionally returns expired rejections
messages/send and related calls now support a bulk-optimized async mode.
Updated return type documentation for messages/search to include two additional fields, _id and metadata.
Corrected a typo in the documentation for urls/list and urls/search
Added an api call (tags/delete) for deleting tags.
Add inbound mail API calls
Update documentation for inbound calls
Reduce size of auto-async batches from 100 to 10.
Add embedded image support
Update dependencies
Add CSS Inlining option to the sending API calls
Start returning the unique identifier for each message from the sending calls
Added sending options for custom tracking and SPF/DKIM signing domains.