Fixes to Phone Number Formats

1. `:en-us.yml` contained formats for `parse`. While this is a good idea it doesn't work since phone numbers in general depend on `numerify`. 
2. Added cell phone numbers per #162
3. Added space between the number and the left parenthesis, so we get `(510) 555-1212` instead of `(510)555-1212` which more accurately reflects the US format.