co♻e: unittest framework for CODESYS

| ======================================
| Failed tests : 92
| Successful tests: 91
| Tests: 183
| Test suites: 14
| ==========TESTS FINISHED RUNNING==========

Added several new features/improvements;
* autodetect and skip an empty testsuite,
* AssertArray2dEquals_REAL(),
* AssertArray2dEquals_LREAL(),
* AssertArray3dEquals_REAL(),
* AssertArray3dEquals_LREAL(),
* TEST_FINISHED_NAMED(),
* Removed I_XmlControl and I_FileControl interfaces,
* FB_XmlControl,
* Renamed all FB_XmlControl methods
* FB_FileControl,
* FB_StringBuffer
* E_XmlError,
* Renamed External support into CODESYS Support