RC Fixes

Just a few little things:

- Added net40 version to portable tools project and nuget package
- Logged issue #5 where tasks are not started and tests do not finish (will investigate best way to resolve this)

To run the tests yourself: ` .\build-and-test.ps1` from the command line

To generate a new package: ` .\create-package.ps1` from the command line.

To bump the version - set `$BaseVersion` in `.\Build\Scripts.ps1`