v2.1.0

Added

• Links to original source files (6740859)
• CHANGELOG.md
• Maven pom.xml and common .gitignore (thanks to @httpdigest)

Changed

• Switched to MIT license
• Replaced usages of ImageIO with STBImage (c3723ff)

Fixed

• Updated link to LM3DGP in README.md (e67ddda)
• Initialized key callbacks before init() in Tutorial.java (e0553fa)
• Clamped dot product in Interpolation.java(9f9dde4)

Removed

• glm package (0f6630e, ee480cb)