Split Janeway into Janeway and JanewayAPI
-This resolves the cyclic dependency in Gradle, and solves the other Gradle issues of building in Eclipse and making a distributable
Add External build tool to Janeway

-Fixes Eclipse build on Windows
-TODO Test on other OS
Improve Eclipse generation in Gradle build

-Add Gradle nature in case Gradle plugin is installed
-Add External Builder to Janeway/build.gradle so it stays when
regenerated
-TODO: Change Gradle build to work on *nix platforms
Update Eclipse external builder to work on Unix

-TODO: Fix Dist build in gradle