add import so sage_server.py works with sage-6.1.1 (issue reported by chris magyar)
add import so sage_server.py works with sage-6.1.1 (issue reported by chris magyar)

tscholl2/smc,tscholl2/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,sagemathinc/smc,tscholl2/smc,DrXyzzy/smc,DrXyzzy/smc,sagemathinc/smc,DrXyzzy/smc,sagemathinc/smc,sagemathinc/smc