Add 'simple' Address Validation class (gabrielbull#119)

* Add Simple Address Validation class
* Always return array of results, even when only one result
* Add logger to Address Validation classes, make sure an array is always returned & introduce unit tests for SimpleAddressValidation
* Add documentation for new simple address validation class

Update Changelog for 0.7.10

TimeInTransit Service Codes, InternationalForms EEIFilingOption & Add…

…itionalDocumentIndicator, StatusType Constants, Unit Bug Fix (gabrielbull#108)

* add new time in transit service response codes.

add in EU time in transit response codes

fix constant naming collisions.

* Add the AdditionalDocumentIndicator, which adds the EDI or EDI-PULL section in the bottom right corner of the shipping label. This node is not present by default.

* Add the EEIFilingOption node to the InternationalForms container. Associated nodes include UPSFiling, ShipperFiling, and POA. Also added a new directory for entity test classes so we can check the constructor, getters, setters, and toNode methods on the entities.

Remove one StyleCI PHP Issue

be more stringent. don't just assert not empty. make sure it equals what we want

* Add StatusType Code Constants Per UPS Tracking API Documentation

gonna get squashed

also gonna get squashed

* Update CHANGELOG.md to reflect 0.7.9 changes

Update CHANGELOG.md

Update CHANGELOG for 0.7.7

Update CHANGELOG.md

Update CHANGELOG.md

Update CHANGELOG.md

Adjusted changelog for 0.7.2

Merge pull request gabrielbull#75 from styks1987/master

Update Tradeability to use SoapRequest instead of Request