dap-server: Made the DAP2 ASCII response a 'returnAs' parameter for the DAP2 Data response.
dap-server: Changed Get as NetCDF-4 button to utilize the DAP2 based response (which works without DAP4 BES changes).
Applied patch from LARC to the HTML form.
Merge branch 'master' into hyrax_1.9_release

This moves the patch from LARC for the HTML form to the release branch.