Offline player UUID fix

Again, thanks for everyone who contributed with pull requests!

• Added support for PreciousStones (thanks @boosik)
• Added event values for inventory open and close events (thanks @TheLimeGlass)
• Added tamer expression for tame events
• Fixed a bug with offline player UUIDs
• Fixed a typo in aliases (thanks @JeepSmash)
• Fixed sweeping edge enchantment (closes #401)
• Fixed husks with Minecraft 1.11 (closes #292)
• Fixed a bug with sorted expression (closes #405)
• Fixed a bug which caused player to fall through blocks with walk on events (closes #406)
• Fixed event-entity referring to tamer in tame event (closes #361)
• Updated default English aliases (thanks @tim740)