Shop Purchases, Performance Boosts, Dynamic UI, Oh My!

Release v0.3.0

Minecraft 10.1.2 - Tested on spongevanilla-1.10.2-5.0.0-BETA-99

Changes:

• Added /shop buy and /shop set price commands to enable purchase and sale of shops (You can also set the shop price via the owner view)
• Added shop lookup optimizations to reduce occurrences of lag spikes when interfacing with shops
• Overhauled UI - UI now shows click actions dynamically based on the player's permissions
• Updated to Sponge API 5.0.0
• Numerous bugfixes

Enjoy!