Plugins for data type conversions (e.g. Math.NET Support)

[Rickasaurus]

From #3

The conversion to and from Matlab datatypes is unexpectedly difficult. Furthermore, there are a number of other libraries that would benefit from type-level interop. To do this we need a two way lookup mechanism.

1. Data going from F# to Matlab needs to be converted properly. For example, arrays of complex numbers must be converted one at a time.

2. Data going from Matlab to F# needs to be massaged. For example, even 1d arrays in Matlab will be retrieved as 2D matrices in .NET.

The plugins should be explicitly referenced in the configuration file.