comprehensible compact git versioning should be ensured

[nspielbau]

renaming nodes, modifying constants, etc. lead to many changes in the corresponding yaml files (eg. renaming "ProcessSubtree" to "ProcessSubtree1") git diffs and commits cannot be quickly checked with such a behavior. it seems a more deterministic file saving process is required. An important point is to ensure comparability for reading existing trees and allowing them to migrate to any new strategy.