Installation document improvements
Installation document improvements

Add notes on ip4r installation and populating the database. Debian /
Ubuntu are the only supported distributions for now.

Part of #173

bbaja42/NIPAP,SoundGoof/NIPAP,plajjan/NIPAP,SoundGoof/NIPAP,fredsod/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,SpriteLink/NIPAP,garberg/NIPAP,SpriteLink/NIPAP,SoundGoof/NIPAP,SoundGoof/NIPAP,garberg/NIPAP,SpriteLink/NIPAP,fredsod/NIPAP,garberg/NIPAP,SoundGoof/NIPAP,SoundGoof/NIPAP,ettrig/NIPAP,ettrig/NIPAP,ettrig/NIPAP,ettrig/NIPAP,plajjan/NIPAP,garberg/NIPAP,bbaja42/NIPAP,SpriteLink/NIPAP,plajjan/NIPAP,fredsod/NIPAP,fredsod/NIPAP,SpriteLink/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,plajjan/NIPAP,ettrig/NIPAP,garberg/NIPAP,SpriteLink/NIPAP,plajjan/NIPAP,ettrig/NIPAP,bbaja42/NIPAP,garberg/NIPAP,bbaja42/NIPAP,plajjan/NIPAP