I made it work, really, I just googled libudev and found a solution, see, in the Linux gitter app, the libudev thing is just a symlink, but the symlink is broken in newer ubuntu versions due to the libudev.0 being removed, so I just created a symlink from the new libudev to the old one.
like so: sudo ln -s /lib/x86_64-linux-gnu/libudev.so.1 /lib/x86_64-linux-gnu/libudev.so.0
I found a way to unload the app and load github into Gitter window. only window.history.back() in console helps. When I pop user hint, the user card appears as tooltip. clicking on username opens her github account and unloads Giiter
@mydigitalself as far as I can tell, the post install scrip does link to a valid libudev file, the problem is the gitter app isn't searching for it in the right place. I added the other link as suggested in #21 and it worked.