Refactoring TADPHP\TADHelpers and Providers\TADZKLib:
In order to delegate actions related to both classes, Provider\TADSoap and Provider\TADZKLib, some methods with very specific functions are being
moving from TADPHP\TADHelpers to Provider\TADZKlib.

Other changes:
- Fixing some errors in README.md
Refactoring TADPHP\TADHelpers, Providers\TADSoap and TADPHP\TAD:
In order to delegate actions related to Provider\TADSoap and Provider\TADZKLib, a single method with very specific functions is being
    moved from TADPHP\TADHelpers to TADPHP\TAD class. Also Providers\TADSoap has been ajusted.

The whole idea is TADPHP\TADHelpers class just exposes methods to dealing with responses generated by TADPHP\TAD class.
Merge branch 'refactoring_tadhelpers_tad_and_tadsoap' into develop
Merge branch 'refactoring_tadhelpers_and_tadzklib' into develop
Some refactoring in TADPHP\TAD and Providers\TADSoap classes to simplify a few things and to fix errors in Test\TADSoapTest.
Merge branch 'tests_fixing' into develop
updating to 0.2.0
Merge branch 'release-0.2'