Rename MgClient to MailgunClient
Use .NET naming conventions for methods
Use .NET naming for fields
Use .NET naming for properties
Rename "Mg" to "Mailgun" in class names
Fields should be private, and exposed through properties when necessary
Choose a better name for the RestClient field
Generate the documentation XML for Debug and Release configurations
Merge pull request #19 from sharwell/standard-naming

Standard naming conventions
Merge pull request #18 from sharwell/release-docs

Generate the documentation XML for Debug and Release configurations