Ubuntu installation instructions incorrect

[Kartoffelsaft]

After entering the first build command, I get this result:

$ sudo apt-get install libanttweakbar-dev libanttweakbar1 libsfml-system2.4 libsfml-graphics2.4 libsfml-audio2.4 libsfml-window2.4 libglew-dev libeigen3-dev libglm-dev libsfml-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package libanttweakbar-dev
E: Unable to locate package libanttweakbar1
E: Unable to locate package libsfml-system2.4
E: Couldn't find any package by glob 'libsfml-system2.4'
E: Couldn't find any package by regex 'libsfml-system2.4'
E: Unable to locate package libsfml-graphics2.4
E: Couldn't find any package by glob 'libsfml-graphics2.4'
E: Couldn't find any package by regex 'libsfml-graphics2.4'
E: Unable to locate package libsfml-audio2.4
E: Couldn't find any package by glob 'libsfml-audio2.4'
E: Couldn't find any package by regex 'libsfml-audio2.4'
E: Unable to locate package libsfml-window2.4
E: Couldn't find any package by glob 'libsfml-window2.4'
E: Couldn't find any package by regex 'libsfml-window2.4'

Trying to build the project, I only encounter issues with anttweakbar and not sfml (as I do have libsfml-dev installed). Also, from my research, anttweakbar has no Ubuntu packages and building and including it by hand is a huge pain.

I am using PopOS, which might make a difference, but as far as I'm aware it should be using the same package repositories.

Also bump for #15

[MichaelMoroz]

Yeah, anttweakbar is a pain. There was an interface module I was working on, but its currently on hold, so no idea when I'll get back to it.

[WAUthethird]

This has been fixed for the most part, so I'll close it.