Update: more icons

This is a small update adding a bunch of new icons. Mostly there are now new tools (fishing rods, axe, butcher knife) and weapons (several swords and axes) and some arrows and bolts for the bow and crossbow. All of the above come in different colour variants so you can have more variety for your equipment. I have also added some more gems, fossils and artefacts that could be found in a mine.

I am planning to keep adding more icons, focusing on metal and mining related items first.