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.