make sure root logger has the same formatter

git-svn-id: svn://svn.icculus.org/fs2open@10321 387891d4-d844-0410-90c0-e4c51a9137d3
make sure child mods get installed, not just parent mods

git-svn-id: svn://svn.icculus.org/fs2open@10322 387891d4-d844-0410-90c0-e4c51a9137d3