2.0.0
- Solidity compiler version changed from 0.4.x to 0.5.x
- Gas optimizations (especially for enumerable extension)
- Full style guide
- Testing environment switched from truffle to specron
- Dependencies removed so the ERC-721 contracts can be used directly from the remix
- Visibility of functions changed to provide better extendability as well as better safety from implementation mistakes
- Documentation improvements