Alow setting and sending of a resource pack to players

This relies on GlowstoneMC/Glowkit#49

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*Edited by turt2live*

**Related Links:**
- Glowkit: GlowstoneMC/Glowkit#49
- No ticket (none needed)
These one line methods counter the rest of the file. Just a note for whoever pulls this as it's not urgent