Update documentation for use in both scripts and Visual Studio projects

[n7581769]

At present, the BioProviders examples only show how to use the type provider in an .fsx script file. Since we are publishing on NuGet, it will likely be used in Visual Studio projects too, and we should include examples of doing that.

[n7581769]

I've added some comments in GenBankExample.fsx in bb24cb4 to indicate that the package can be installed in an IDE or through the command line in a project. I'm not sure if we want comments elsewhere. However, since we'll probably have a RefSeq provider at some point, maybe we will want to extract the common parts such as referencing and opening the package to a separate page.