Fixes crash in the texture replacement editor: Erasing the end element of a size 0 vector is probably not a safe thing to do

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10717 387891d4-d844-0410-90c0-e4c51a9137d3
restore a strcpy that was accidentally removed in r2768 (fixes Mantis #3046)

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10718 387891d4-d844-0410-90c0-e4c51a9137d3
Removing dead and potentially confusing code

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10719 387891d4-d844-0410-90c0-e4c51a9137d3
remove Import Weapon Loadouts feature, which was mainly used for versions of FSPort prior to 3.0 and was broken from r2768 to r10718 anyway

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10720 387891d4-d844-0410-90c0-e4c51a9137d3
Fix for Mantis 3045: gr.drawImage()'s UV arguments aren't working properly

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10721 387891d4-d844-0410-90c0-e4c51a9137d3