Adds set-motion-debris-override sexp. This can be used to control the presence of motion debris, and overrides any user choice made through the -nomotiondebris commandline flag.


git-svn-id: svn://svn.icculus.org/fs2open@10445 387891d4-d844-0410-90c0-e4c51a9137d3
Add lua function to get a handle of the current player

git-svn-id: svn://svn.icculus.org/fs2open@10446 387891d4-d844-0410-90c0-e4c51a9137d3
ensure stoplight is not schizophrenic

git-svn-id: svn://svn.icculus.org/fs2open@10447 387891d4-d844-0410-90c0-e4c51a9137d3
interrupt the download even if it's cancelled before it starts

git-svn-id: svn://svn.icculus.org/fs2open@10448 387891d4-d844-0410-90c0-e4c51a9137d3
make cancellation more robust: don't cancel things that were already cancelled or complete; don't fire completion events more than once for the same item

git-svn-id: svn://svn.icculus.org/fs2open@10449 387891d4-d844-0410-90c0-e4c51a9137d3
gui adjustments

git-svn-id: svn://svn.icculus.org/fs2open@10450 387891d4-d844-0410-90c0-e4c51a9137d3