Stale CC BY-NC 3.0 headers in bkcore/hexgl/* vs the 2015 MIT LICENSE

[MatthewJamisonJS]

Hi Thibaut — first off, HexGL still holds up beautifully. I'd like to host an attributed copy of it in a small free-games section on my personal site (matthewjamison.dev — it's my music EPK, and it does sell my own records, so I have to be careful about the non-commercial question below).

While auditing the files before vendoring, I hit a licensing ambiguity I'd rather resolve with you than interpret on my own:

• The repo gained a root MIT LICENSE in c8e65a6 (Aug 2015), which I read as the resolution of License Suggestion  #25/License change request (another one) #29.
• But nine files still carry their older @license CC BY-NC 3.0 headers from 2012: the files under bkcore/hexgl/ (HexGL.js, Gameplay.js, ShipControls.js, ShipEffects.js, CameraChase.js, HUD.js, RaceData.js) plus tracks/Cityscape.js.
• The README's license note says MIT applies "unless specified in the file" — which, on a plain reading, makes those stale headers control for exactly the files the game can't run without.

Two asks, either works for me:

1. Could you confirm the 2015 MIT relicense was intended to cover those files too?
2. Even better, a small commit sweeping the old @license CC BY-NC 3.0 lines out of those nine headers would make the repo unambiguous for everyone downstream.

If instead the NC headers are intentional and those files were meant to stay CC BY-NC, that's completely fine too — I just won't ship it on my site, and I'd suggest the README note mention it so others don't trip on the same thing.

Either way: full "game by Thibaut Despoulain" credit linking here, LICENSE shipped alongside, no modifications beyond what's needed to serve it standalone. Thanks for the game!