Endpoint changed and minor code-refactoring

Merge remote-tracking branch 'origin/master'

# Conflicts:
#	src/Provider.php

Endpoint changed and minor code-refactoring

v1.4

ResourceOwner property assignment bug fixed and resource owner API en…

User Info API endpoing changed

https://www.previewtechsapis.com/identity/v1/user-info has been replaced with https://myaccount.previewtechs.com/api/v1/identity/user-info

User Info API endpoing changed

https://www.previewtechsapis.com/identity/v1/user-info has been replaced with https://myaccount.previewtechs.com/api/v1/identity/user-info

OAuth 2 Endpoint updated

v2.2

url changed in tests too

OAuth 2 Endpoint updated

v1.2

Oauth2 url changed in tests too

Provider fully re-factored

v2.1

One unit test fixed

Provider fully re-factored

v1.1

Provider re-factored

Release for PHP5.6 or greater

v2.0

Preview Technologies OAuth2 client created PHP5.6 or greater version …

Initial Release

v1.0

Preview Technologies OAuth2 client created