update changelog
Fix typo
Add a phone number validator

- includes a default validation regex
- supports US and international number formats
- reuses email validation regex override option
- reuses email validation error message override option
Merge pull request #76 from CodingZeal/phone_number_validator

Phone number validator
Merge branch 'master' of github.com:voltrb/volt
Merge branch 'master' into task_logging
Update TaskTracker logging method

- Show only severity and message in logs (remove severity code and
  timestamp)
- Only log after dispatch is complete
- Localize log method timer