Merged Package Class and PackageReader Class
Added ColorHelperClass to store Nebula colors
Added simple vector class to represent two or three floats
* Color.cs: Added simple Color-Class to represent colors used in
  nebula files

* nebula-1-lib.csproj: Added Color and Vector Classes
Merged Package and PackageFileReader Classes
Fixed naming collision between .net color and NebulaColor
Mesh Class: Read out all vertex data