Merge pull request #16 from hakre/patch-email-and-password

Release v1.1.12
Version bump v1.1.14

- Fix broken upload (403), `_subject_uid` is required. See Issue #25
- Fix PHP 5.5. deprecation warning curl file. See Issue #22
New: Testuite created
Update: Test: Constructor test to cover parameter exceptions
Fix: Visibility of members and methods

Members and methods() used privately were declared protected. As there
are no test-stubs there is no use for this.
Fix: Make class final

The class has been declared final to prevent it getting extended.
Update: Switched to SPDX license identifiers
Update: Renamed extension of README.markdown

- .md is more common than .markdown .