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This commit implements the .tex-based online help system in LON-CAPA. It may be necessary to manually run loncom/build/help_graphics_converter.pl and doc/help/rebuildLabelHash.pl after a cvs update, and loncapa_apache.conf may need to be manually copied to /etc. (The loncapafiles.lpml has been updated.) After merging this, the URL http://[loncapahost]/adm/help/Foils.hlp should display a help file. Also, some *very* out-of-date files have been removed from the /doc directory.
You can use variables in the \textbf{Answer} part of the question, too. This means you can compute an answer to a question, which we'll see in a bit. If you set the answer of the question to be \textbf{\$variable}, \textbf{Save Changes} and \textbf{View} it, you'll see that LON-CAPA is now expecting {}``3.0'' as the answer, plus or minus 5\%.