properly exit the download if an error was encountered in one of the entries

git-svn-id: svn://svn.icculus.org/fs2open@10749 387891d4-d844-0410-90c0-e4c51a9137d3
bump version

git-svn-id: svn://svn.icculus.org/fs2open@10750 387891d4-d844-0410-90c0-e4c51a9137d3