stubbing out tests and sample packages for testing
getting an error to be raised when the package cannot be found
second test implemented
updated integration test to respect the newly-enforced package checks
added test for a failing New-Release and tidied up the exception handling
resolve headaches with multiple nupkg files being created
when scanning dependencies specify the target framework based on our package
added edge case for when package does target multiple platforms (that's bad)
Merge pull request #184 from github/release-package-improvements

Release package improvements