tinyTiM 2.0.0a5 released

Changes:
* Updated to TMAPI 2.0a2
* Updated TMCL constants (implemented by Hannes Niederhausen)

Bugfixes:
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* Bug #2812460 -- Port the Check class from Ontopia back to tinyTiM
* Bug #2809821 -- Ensure same topic map constraint
* Bug #2561306 -- Move TinyTimMapInputHandler to the core
* Bug #2824834 -- Reifier at duplicate construct fails
* Bug #2824837 -- Same iid at a duplicate statement does not work