Project gardening

1. Add support for .nuget restore
2. Use nuget package instead of local one (newtonsoft.json)
3. Gardening of binaries
4. Add buildscript (also supports myget)

```ps
.\build.ps1 (Builds .NET 4.0/4.5/4.5 AnyCpu by default)
```
I've not made any changes to the code base itself.

Also i'd appreciate if you could upload the generated nuget package to nuget.org. It should take you literaly
1 minute todo so with these changes ;)