a0.5.0 Snapshot 1 Changelogs

Additions:
- Added back button to the credits menu

Changes:
- Music now plays immediately instead of waiting for the now playing text to disappear
- Changed the Red Granite, Jasper, Shale, Limestone, and Marble textures
- Changed terrain and cave generation to utilize SharkPool's Perlin Noise extension
- Changed all RNG to use a PRNG algorithm that allows seeded RNG

Removals:
- 

Fixes:
- Fixed a bug where two songs would be played at the same time if the game tries to play a song that just played
- Fixed lava being the same color as water in the World Map
- Fixed a bug where logs, leafy logs, and leaves in the chisel menu were not working correctly