co♻e: unittest framework for CODESYS

New in v0.9.0.1;
Replaced GVL_Constants_CfUnit with GVL_Param_CfUnit.
TEST_FINISH() now returns a TRUE when called.
Various small tweaks

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"

First commit of CfUnit 0.0.0.1