Bug fix

The same issue came up where phone validations were preventing customer accounts from being updated.  I was able to reproduce this error and turns out the issue is that some customer accounts have a phone that has no name or number, which causes a validation to fail.  The issue is that you cannot delete these phones for some reason.  To combat this, I went into app/models/phone.rb and removed the 

`validates_presence_of :number` 

line. 

Pow is still not working on my system so I was unable to see if this fix actually worked, if you could test this for me and complete this pull request, that would be awesome.