Full support for adding templates
Added support for Subaccounts API

Mandrill /subaccounts/ API methods mapped
Added Integration tests for Subaccounts API
Update README.md
Merge branch 'master' of https://github.com/tetsuo13/Mandrill-dotnet

Conflicts:
	src/Mandrill/Mandrill.csproj
	src/Mandrill/Models/SubaccountInfo.cs
Add support for retrieving content of recently sent messages
Merge pull request #49 from tetsuo13/get_message_content

Add support for retrieving message contents