32: Incremented version 1.6.0

Change-Id: Ia0df860e2c6e1b0520dba5f49d6f1ea4cbcdaea9
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/32
32: updated api filter

Change-Id: I5a3b55a44e60e0f14167194329b5dc3c7c49e6fb
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/32
32: Test new addToTrace method and remove the deprecated one 

Closes #32

Change-Id: I662ce8c2440ea74c293f855e8db165277101ef58
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/32