Merge pull request #1 from peelman/add_more_formats

Adding some more specs and more formats:
Merge pull request #2 from peelman/add_more_formats

Missed a validation test...
Merge pull request #3 from peelman/add_more_formats

require `rspec/matchers` to eliminate app problems and keep tests passin...
Merge branch 'master' of github.com:peelman/missing_validators
Add IMEI validation
Merge pull request #6 from peelman/add_imei_validator

Add imei validator