[release] Create release note 0.0.21

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### Description

#### Live Demo

http://jsfiddle.net/gh/get/library/pure/fnndsc/ami/tree/master/lessons/01#run

#### Steps to Reproduce

#### Expected Results

#### Actual Results

### Browsers Affected
- [ ] All
- [ ] Chrome
- [ ] Firefox
- [ ] Edge
- [ ] Safari 9
- [ ] Safari 8
- [ ] IE 11

### Versions
- AMI: vX.X.X
- THREEJS: vX.X.X