timestamp parsing

@imlucas 
logparse-spec.md
reformatted the example since there should be line breaks after each log line

patterns.js
- added timestamp patterns
collapse into a single pattern like so:
```javascript
 regret.add('ctime', /\w{3} \w{3}(: )? \d{2} \d{2}:\d{2}:\d{2}.\d{3}/)
```