Update EmailAddress.cs

I didn't like that it took three lines of code to create new email addresses, so I added some overloads to the NEW EmailAddress code. Please let me know if this is written correctly. I was unable to properly test this.
Update EmailAddress.cs

Minor update to code
Merge pull request #28 from ekazda/patch-1

Update EmailAddress.cs
Merge pull request #29 from moacyr/master

Added new search result state
Addressed issue with sent_at expandobject property defaulting to DateTime MinValue which results in a "Email scheduling is only available for accounts with a positive balance"
Merge pull request #32 from rillemjg/master

Addressed issue with send_at ExpandoObject property.
Modified test to accomodate for un paid testing accounts.
version bump
Fixed README.md call to UserInfoAsync
Merge pull request #34 from tleite/master

Fixed README.md call to UserInfoAsync
Create Info.cs
Added Messages Info
Update Mandrill.csproj
Added inbound support to WebHooks

Also added missing properties to the WebHookMessage class to support
processing of inbound messages
Updated readme for Messages Info method call
Added support for SmtpEvent

Created SmtpEvent class and added this to WebHookMessage and
SearchResult classes
Diag & BounceDescription properties
Added subaccount property
removed unused using directives

Sorry I left them behind
Added Cc & Bcc SendMessage method

Mandrill support provided me with a work around on how to send emails
and specifying Cc recipients by adding SMTP headers in the API.  I have
added a simple method that takes a collection of To, Cc, Bcc recipients
and add the appropriate SMTP headers.