Remove dashes/spaces in BackpagePhone table

[bmenn]

Per request from anidata/ht-archive#10, phone numbers should be stored without dashes, spaces, or other special symbols.

Tasks to do:

• [ ] Create Luigi Task to strip special characters

[omnunum]

I dont think we need a task for this since we can do this in sql and it only takes a second to run.

UPDATE backpagephone SET number = regexp_replace(number, '[-\n]', '', 'g');

This fixes up 100% of the records.

[dlrobertson]

Resolved by #12