Fixed a load of issues related to my "sync" approach, and Mac OSX's "async" API.

...wserbundle/src/main/scala/net/i2p/RouterLauncherApp.scala

launchers/build.sbt

launchers/macosx/build.sbt

launchers/macosx/obj-cpp/AppDelegate.h

launchers/macosx/obj-cpp/Info.plist

launchers/macosx/obj-cpp/JavaHelper.h

launchers/macosx/obj-cpp/JavaRunner.cpp

launchers/macosx/obj-cpp/JavaRunner.h

launchers/macosx/obj-cpp/RouterTask.h

launchers/macosx/obj-cpp/RouterTask.mm

launchers/macosx/obj-cpp/build.ninja

launchers/macosx/obj-cpp/include/strutil.hpp

launchers/macosx/obj-cpp/main.mm

...macosx/src/main/java/net/i2p/launchers/BaseExtractor.java