fails to download code plugins

[nonchip]

pretty much the same as Allar/ue4-mp-downloader#2

tl;dr: they did some changes to their api (see https://github.com/Allar/ue4-mp-downloader/pull/6/files?utf8=%E2%9C%93&diff=unified#diff-a39973b01a986e2d29455c2dd2af1c78R538 of how it would've got fixed if that project wasn't dead), which makes it require a key now.

also, unrelated, but, i've noticed when looking through the code for where it's going wrong (https://github.com/Erlandys/UE4LinuxLauncher/blob/master/src/launcher/EpicAPI.java#L914 btw), you're kinda faking to be that project in your user agent, maybe that might wanna get a fix too? ;)

[Erlandys]

thanks for notice, I will try to check the changes and try to fix it. About the user agent, well for true, I was making the system by Allar project, so I took his user agent, didn't really knew which to change :)