plus more!

- Changed Entity registration so it only uses 'registerModEntity' to fix potential issues
- Added crystal blocks
- Changed Jewelry Tab to not override TiCon tabs (sorry TiCon, your system is good, but not for me)
- The player renders in the Jewelry GUI (makes it easier for you to see how the jewelry render)
- The Pentagram now has an actual effect
- The Pentagram now renders beneath your feet when you look down and no longer does it in your inventory; it is also a lot smaller
- Working on Structures
- Created my own WeightedRandomItem (why isn't this in vanilla?)
- Updated the curse API so now people can specify when a curse can be activated (I believe the world is all you need :p)
- Some curses can no longer aquired in hardcore (such as Rotten Heart, Midas Touch etc) which would make it impossible to work with and require a total restart of the game (as the only way to get rid of them is by dying to replace them)

Hooraaay for proper changelogs!

- Fixed a type where the "Thieving Gloves" were named "Thiefing Gloves"
- Fixed the world from crashing when entering one
- Changed Flaming Soul Curse to set players on fire when they attack something, rather than randomly
- Player no longer gets blinded when the ritual starts
- The ritual now creates a sphere of darkness around it