Add city to AddCustomer and AddShipping.

Fixes https://github.com/AuthorizeNet/sdk-dotnet/issues/40.
Added email parameter to AddCustomer and AddShipping
Added email parameter to AddCustomer and AddShipping
removed this user file.
time to ignore some files that we don't want in the repo.
Merge branch 'master' of https://github.com/digitaltouch/sdk-dotnet
Merge branch 'master' of https://github.com/drmohundro/sdk-dotnet

Conflicts:
	Authorize.NET/AIM/Requests/GatewayRequest.cs
	Authorize.NET/AIM/Requests/IGatewayRequest.cs