Add better initial documentation

README.md

@@ -1,2 +1,16 @@
 # packwiz
 A command line tool for creating minecraft modpacks.
+
+## Installation
+In future I will have a lot more installation options, but for now the easiest way is to compile from source.
+
+1. Install Go
+2. Run `go install github.com/comp500/packwiz`
+
+## Getting Started
+- Run `packwiz init` to create a modpack in the current folder
+- Run `packwiz refresh` to update the index of mods
+- Run `packwiz curseforge install [mod]` to install a mod from CurseForge
+- Run `packwiz update *` to update all the mods in the modpack, or replace * with a mod to update it
+- Run `packwiz curseforge export` to export the modpack in the format supported by the Twitch Launcher
+- Use the `--help` flag for more information about any command