Fix map and spread

Version 6.0.0

Merge pull request #17 from gm-core/5-0-0-update

5.0.0 updated docs

Merge pull request #13 from gm-core/v4-dev

V4.0.0

Bump version

Update README docs with _reverse and _slice

Update to 2.1.0

Add CONTRIBUTORS file

Merge pull request #3 from twisterghost/gms2-port

Gms2 support