Added FromAddress and FromName to ExactTargetTriggeredEmail class to be able to specify sender information in a triggered email.

I needed to specify the sender email address when I send triggered emails so I needed these two properties to set Subscriber.Owner. 

Official doco here under the section "Determining the From Information at Send Time":
https://help.exacttarget.com/en/technical_library/web_service_guide/triggered_email_scenario_guide_for_developers/#Determining_the_From_Information_at_Send_Time