#712 SDL "about" window need to update before 2.2.3 release

[Eugene]

http://savepic.su/6131287.png

src/drivers/sdl/gui.cpp

• Year update 2012 -> 2015
• current/past contributors update

[Lukas Sabota]

Updated in r3165 - let me know if I missed anything (used Authors file for contributors tab)

[Eugene]

https://sourceforge.net/p/fceultra/code/3145/

You've forgot Feos and RainWarrior i think

[Lukas Sabota]

Added in 3166; was completely unintentionally - was just basing it off of the Authors file instead of r3145

Thanks