Merge pull request #13 from XeeX/dev

Dev
Merge pull request #14 from XeeX/dev

Update README.md
Create LICENCE
Rename LICENCE to LICENCE.md
Applied workaround for PCL libraries to PortableLeagueApi.Interfaces
Applied workaround in other projects, too.
Added .nuspec files for NuGet packaging
Merge pull request #16 from myget/master

Project now builds on MyGet Build Services