* Now compiling in a separate directory using truffle 5.
* Ported to 0.5.1, now compiling using 0.5.1.
* test now also compiles using the truffle 5 hack.
* Downgraded to 0.5.0.
* Sorted scripts.
* Cleaned up the compile script a bit.
* separate part of ERC721Mintable into ERC721MetadataMintable
* remove mint and burn from 721 tests
* Fixed linter error.
* fix ERC721 mint tests
* Minor fixes.
(cherry picked from commit 744f567f40)
* separate part of ERC721Mintable into ERC721MetadataMintable
* remove mint and burn from 721 tests
* Fixed linter error.
* fix ERC721 mint tests
* Minor fixes.