Added Slimv-specific code back to swank-mit-scheme.scm

Added Slimv-specific code (loading options, restarting swank server) back to swank-mit-scheme.scm.  This fixed an "unbound variable: o" error on load of swank-mit-scheme.scm in the MIT-Scheme 9.2 REPL (using OSX 10.9.5) that was blocking loading of the server.  Vim is now able to start and connect to an MIT-Scheme swank server.