Remember to schedule redraw().   Probably not necessary, but trying to squash bug that's appeared in MacOS Lion.

Put alloca stuff before all other includes.

in each of the files that uses alloca.

small additions/changes to make os x and windows buildable and functional. open issues on windows time motion widgets and terminating cleanly.

Where appropriate, update references to geomview license too,
now called COPYING.geomview.

Once we pick a license this might change, but
in the mean time, at least the NCSA UIUC origin is noted.