Modified the way the command string is constructed for calling the text-based browsers (w3m, lynx, etc.).
Restored necessary quoting of file names.
Added variables W3M_OPTS, LYNX_OPTS for passing arguments to the selected text-based browser.
Include `-dump' into W3M_OPTS, LYNX_OPTS. adjusted `a2x' manpage to document the changes (also fixed a few typos).
Merge pull request #26 from jghub/a2xfix

Modified the way the command string is constructed for calling the text-browsers