Drop all liveries, make/update standard boeing 707-320 livery

[Megaf]

We need updated liveries, done in good quality.

[sidi762]

Hi Megaf, just to note that DDS is still not able to load on macOS so I think it's better to keep it PNG atm.

[Megaf]

@sidi762 I had some issues here on Linux with DDS liveries too. I agree.
We are keeping all in PNG.

[Megaf]

@sidi762 Could you please somehow test if you still have issues with DDS textures on macOS?

[FirstOfficerDelta]

There is a modified paintkit by Pilot2938 which is basically a higher resolution compared to the original 707 liveries. However, it takes about 5-10 more FPS compared the liveries packed with the aircraft. The livery used for this comparison was Pilot2938's Sabena livery.

[Megaf]

@FirstOfficerDelta Hum, 707 is a nice model for legacy and old hardware, quite lightweight, it'd be nice if it stayed like that.
Where can I reach Pilot2938?