Proposed schedule for JavaFX 16

[Kevin Rushforth]

Here is the proposed schedule for JavaFX 16.

RDP1: Jan 7, 2021 (aka “feature freeze”)
RDP2: Jan 28, 2021
Freeze: Feb 18, 2021
GA: March 9, 2021

We plan to fork a jfx16 stabilization branch at RDP1. The GA date is 
expected to be one week ahead of JDK 16, matching what we did for 15.

As was done for the previous release, the start of RDP1, the start of 
RDP2, and the code freeze will be 16:00 UTC on the respective dates.

Please let Johan or me know if you have any questions.

-- Kevin