Include legacy documentation in pdf and MS Word format - Modules

[rafmudaf]

Feature or improvement description
Until the legacy documentation can be fully converted to the readthedocs / sphinx format, we will be including old documentation in the existing format.

This pull request includes documentation for specific modules and FAST.Farm. It is a follow on to #805.

Related issue, if one exists
#804

Impacted areas of the software
Online docs.

See the documentation live at https://raf-openfast.readthedocs.io/en/docs-legacy/source/user/index.html

[ebranlard]

Sorry if this is already included, but it would be nice to add some links for the simulink interface. I think the main documentation is in the FAST 8 pdf document. But we can also point to how to compile it, and where the examples are in the repository. I did receive a bunch of questions about this lately. Sorry if it's already included. Here's the info I was provided with:

The FAST v8 User's Guide provides some documentation on the Simulink interface (https://www.nrel.gov/wind/nwtc/assets/downloads/FAST/FASTv8.16/README_FAST8.pdf).

The above FAST v8 guide can be used with the code and examples here:
https://github.com/OpenFAST/openfast/tree/dev/glue-codes/simulink

[rafmudaf]

Thanks for the suggestion @ebranlard. This pull request is related to a specific list of documentation Jason outlined earlier in the year. I've opened a new issue regarding the Simulink documentation: #868. Please continue to add context and ideas there.

[jjonkman]

@rafmudaf -- Thank you very much for making these improvements to the OpenFAST documentation. This should be a great help to the user and developer communities! Please find a few recommended changes below.

[rafmudaf]

@jjonkman I've addressed your comments here and merged the latest dev branch

[jjonkman]

Thanks for addressing my comments from my original review. I now approve this merge. Please find one minor change below.