nemesis-2009.6.13.1: changelog.md

2009.6.13.1
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### Feature

* add `clean` keyword

### Fix

* allow space before ":" in task description
* remove `.o .hi` for temp file

2009.6.13
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### Feature

* add `desc` keyword

### Fix

* super fast compile 
* -Wall clean

2009.6.12
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Init