Implement a studio upgrade tool

We need a tool that is able to upgrade current definitions (xml persisted files) to new object models when a model change.
This is the case now with life cycle which is not compatible with existing persisted models.

The tool should introspect a deployed studio and upgrade all definitions to the new model.

The problem is how we identify a model change. A solution is to write a file at studio startup into data/studio/.version
with current build version inside.
The tool loks for the current version (if the file is absent a version of 1.0 is assumed) and launch any registered upgrade routine that match the current version.
Upgrade routines should rewrite files n .metadata that needs to be upgrated conforming to the new version.

Upgrade routines may use annotations to specify when they match. Example:

@Version("1.0", type="lf")
public class MyUpgradeRoutine {

public void run(File file)

{ // file to check .... }

}

This upgrade routine will apply if current studio version (the version to upgrade) is 1.0 and feature type is "lf" (i.e. a file ending in *.lf.xml)