Fix two memory leaks in html.c.

They're in htmlInput and encodeTags.
Both are caused by using a temp variable to hold a pointer to
the result of htmlAttrVal and then failing to free the memory after
we've finished with it.
Found another memory leak in html.c, encodeTags().
Chapter 9, various command line utilities.
Merge branch 'master' of git://github.com/CMB/edbrowse
Email link at the bottom, so you don't have to scroll all the way back up to Author at the top.
The git clone command is much easier than the github website reference.
Reference mplayer in streaming audio section. Surely better than the old trplayer.
Better description of mplayer, with mime description and an alias.
Forgot to escape < for html encoding.
Merge https://github.com/CMB/edbrowse
Merge latest changes from Chris's repo