Added more nesc options to the man page

This is a little tricky as there are two perl scripts involved as well
as the actual compiler.

- removed the internal only options from the man page (but noted them in
the source).
- removed -fnesc-save-macros from the source as the flag was never
checked.
Merge pull request #19 from lab11/add-options-to-man

Added more nesc options to the man page