CustomNPCs 1.2-PRE

Hey!

This prerelease includes:

• A command to forcibly remove NPC holograms. /npc clear_holograms. The permission required is customnpcs.commands.removeHolograms.
• Replaced using markers (armorstands without a hitbox) with text display entities.

Note: This is a prerelease and is therefore not rigorously tested. If you find any bugs, please report them in the issues tab.