sbt-remote-control to 1863c3279ea431d2618eef450c4cffbb5c0b7cb3

This version fixes an NPE on a null exception message and
does not add tracing to akka 2.3 projects.
Merge pull request #293 from typesafehub/wip/havocp-rc-bump

sbt-remote-control to 1863c3279ea431d2618eef450c4cffbb5c0b7cb3