allow reopening of HTTP streams using the Range parameter so that we don't need to seek through the entire file first

git-svn-id: svn://svn.icculus.org/fs2open@10888 387891d4-d844-0410-90c0-e4c51a9137d3
remove unused class

git-svn-id: svn://svn.icculus.org/fs2open@10889 387891d4-d844-0410-90c0-e4c51a9137d3
some things that FindBugs complained about

git-svn-id: svn://svn.icculus.org/fs2open@10890 387891d4-d844-0410-90c0-e4c51a9137d3
bump version

git-svn-id: svn://svn.icculus.org/fs2open@10891 387891d4-d844-0410-90c0-e4c51a9137d3