Update of dependencies versions
Update of dependencies versions

Updated Akka to 1.2-RC6
Updated Slf4j api to 1.6.2
Updated Scalate to 1.5.1

timve/gatling,thkluge/gatling,ryez/gatling,gatling/gatling,wiacekm/gatling,pwielgolaski/gatling,MykolaB/gatling,wiacekm/gatling,wiacekm/gatling,timve/gatling,GabrielPlassard/gatling,gatling/gatling,gatling/gatling,wiacekm/gatling,thkluge/gatling,ryez/gatling,MykolaB/gatling,gatling/gatling,pwielgolaski/gatling,GabrielPlassard/gatling,gatling/gatling,MykolaB/gatling,pwielgolaski/gatling,wiacekm/gatling,timve/gatling,thkluge/gatling,thkluge/gatling,GabrielPlassard/gatling,MykolaB/gatling,ryez/gatling,GabrielPlassard/gatling,timve/gatling,ryez/gatling,pwielgolaski/gatling