Added Senders List
updated readme with senders list.
update license to apache 2.0
formatted readme
method name misspelt.
added senders test structure.
added sender and System.Runtime.Serialization to mono proj
version bump for senders list.
change template expected content.
Tag and metadata processing for WebHooks
Removed extra test
Merge pull request #21 from pebezo/master

Support for tag and metadata values in WebHooks
added important
Merge pull request #22 from JeremyWeir/master

Added EmailMessage.important property
Version bump
Correctly deserialize soft-bounced WebHookMessageState in web hook
Merge pull request #26 from rmc47/master

Correctly deserialize soft-bounced WebHookMessageState
Added support for scheduling emails to the Mandrill project. Mandrill has
made this a paid feature and it will only work for accounts with a positive balance.
Fixed issues with deserializing the results from schedule-related calls.
The responses for scheduled calls are different enough from other Messages
responses to justify a separate class.
I also added tests for all scheduling functionality
Updated readme.