a0.5.0 Snapshot 3 Changelogs

Additions:
- Added Birch Leaves
- Added Blue Pearl Granite
- Added Black Granite
- Added Granite
- Added new spikes that use connected textures, the old spikes have been deprecated
- Added Sandy Sandstone

Changes:
- Rewrote the saving and loading systems to utilize JSON (Old saves will be converted)
- Changed the textures for Lava
- Changed the textures for TNT
- Changed the textures for 16 wool types, all other wool types have been deprecated
- All ore deposits now show in the Minerals tab of the Inventory
- Changed the textures for the Birch Wood set
- Changed the textures for 16 concrete types, all other concrete types have been deprecated
- Changed the texture for Red Granite
- Changed the texture for Marble
- Changed the texture for Red Bricks
- Changed the texture for Stone Bricks
- Changed the texture for Tan Bricks
- Changed the texture for Grass
- Changed the texture for Flat Grass and renamed it to Grassy Dirt
- Changed the texture for Sandstone
- Changed the texture for Sand
- Changed the texture for Dirt
- Changed the texture for Blackpowder
- Changed the texture for Limestone
- Changed the texture for Jasper
- Changed the texture for Stone
- Changed the texture for inactive and active Checkpoints
- Changed the textures for the Oak Wood set

Removals:
- 

Fixes:
- Fixed a bug where pressing the pause key while in the in-game Settings menu would put the game in an incorrect state