Building OpenJFX.

[Phil Race]

In the "innovation" email thread it was suggested that one obstacle to
getting involved and contributing to OpenJFX is just building it.
So what are the top one or two pain points with building OpenJFX today ?

- Insufficient or out-dated build docs ?
- Tool-chain configuration problems - platform-specific or otherwise ?
- Needing to do a JDK build as well (JDK 9 and later) ?
- Something else ?

And having identified your pain point(s), what do you think would be a 
solution ?

-phil.