add table with manual names in documentation chapter

[SaranjeetKaur]

This part should be elevated to a new section. Since you already cite R-exts earlier, you can probably drop this See also section.

To make this guide more self-contained, you should briefly describe the bug you link to and use a hyperlink with a title of the linked bug: Bug 15221 - R-admin/'Installing R under Windows': Missing argument name.

Also, you could add a list or table with the manual names and their nicknames.

"The Texinfo manual should be referred to for [how to mark up text]."

Originally posted by @hturner in #66 (comment)