co♻e: unittest framework for CODESYS

- Parts of "Implement optional parameters for the test results".
The following is implemented: Whether a test is skipped, failure message/type for a testcase.

- Moved the general test results (NumberOfTestSuites, NumberOfTestCases, NumberOfSuccessfulTestCases, NumberOfFailedTestCases) into the new test results struct ST_TestSuiteResults, which also containts the results for all test suites.

- Fixed adjusting of AssertFailureMessages from 252 to 253 characters (by removing an unnecessary space character)

- Added logging of all new extended/optional test result parameters to the logger

- Added report logic so that skipped tests are not included in the total amount of successful tests (NumberOfSuccessfulTests = NumberOfTests - NumberOfFailedTests - NumberOfSkippedTests

Commit of CfUnit v0.9.0.0

Better/more easy to use API for CfUnit according to issue #29 "Reduce boilerplate code required for writing tests" and issue #26 "Boilerplate reduction and using a TEST_FINISHED method".
Updated documentation for FB_TestSuite Assertion methods

Also solved multiple issues:

Issue #27 "Multiple assert instances in one test suite causes issues"
Issue #25 "implicit typecasting throws errors + solution"
Issue #23 "Usage of FB_ADSAssertMessageFormatter.LogAssertFailure should warn"
Issue #21 "Remove unused code"
Issue #19 "Rename GVL_Constants"

Commit of CfUnit v0.9.0.0

Better/more easy to use API for CfUnit according to issue #29 "Reduce boilerplate code required for writing tests" and issue #26 "Boilerplate reduction and using a TEST_FINISHED method".

Also solved multiple issues:

Issue #27 "Multiple assert instances in one test suite causes issues"
Issue #25 "implicit typecasting throws errors + solution"
Issue #23 "Usage of FB_ADSAssertMessageFormatter.LogAssertFailure should warn"
Issue #21 "Remove unused code"
Issue #19 "Rename GVL_Constants"