Upgraded LensFlare and SkyBeam

[muzscaly]

Source: https://colobot.info/forum/showthread.php?tid=693

One of the things that I wanted in CGE is a flare from BlupiMania 2.
Because the source code of BlupiMania 2 has opened. Making this feature will be easier.
Flare effect from BM2 is more realistic than flare effect from Colobot. Ahh and these SkyBeams... :)
Creating these SkyBeams could be look like in BM2 scene (Thanks @tomaszkax86 for decoding BM2 scene):

LensFlare image="lens6.tga" dist=-0.50 dim=0.25 intensity=0.8 offsetH=0.00 offsetV=0.00
LensFlare image="lens9.tga" dist= 0.10 dim=0.35 intensity=1.0 offsetH=0.00 offsetV=0.00
LensFlare image="lens5.tga" dist= 0.30 dim=0.40 intensity=1.0 offsetH=0.00 offsetV=0.00
LensFlare image="lens8.tga" dist= 0.55 dim=0.50 intensity=1.0 offsetH=0.00 offsetV=0.00
LensFlare image="lens7.tga" dist= 0.80 dim=0.10 intensity=0.8 offsetH=0.06 offsetV=0.06
LensFlare image="lens7.tga" dist= 1.00 dim=0.08 intensity=0.7 offsetH=0.05 offsetV=0.05
LensFlare image="lens7.tga" dist= 1.30 dim=0.14 intensity=0.5 offsetH=0.08 offsetV=0.08

Of course there will be backward compatibility for e.g. Not yet updated userlevels.

DEMO: https://youtu.be/0bJHncLpxH0