Add reference to System.XML
Added FSharp 4.0.0 to DapperTests NET40 (required at runtime)
Make Dapper.Contrib.Tests prompt in the same way as others at the end of the tests
Merge remote-tracking branch 'upstream/master' into issue-138
Merge pull request #143 from Polylytics/issue-138

Issue 138: FSharp.Core references, plus fix up a prompt on Dapper.Contrib.Tests