Only specify --modules-path when running JavaFX apps

[processing-bot]

Created by: benfry

processing.mode.java.runner.Runner is now specifying the necessary modules for JavaFX (so that it won't complain on startup, but this should only be invoked with real FX2D applications, otherwise there's presumably some overhead.

[processing-bot]

Created by: benfry

See 8e590b6 for the changes. Basically, need to detect when FX2D is in use (look at the parsed code), and include it.

An alternative would be to bump JavaFX out to its own library, and if the sketch imports it, then we do these extra bits. In a similar fashion, we add a means for a Library (renderer) to add its own JVM options. This would also enable us to do the necessary LWJGL tweaks for threading.

[processing-bot]

Created by: benfry

Out of the frying pan, into the fire: #212