Setup additional Galaxy system properties ...

... allowing remote clients to reason more effectively about local Galaxy instance - in particular for metadata script configuration.
Copy in galaxy tool dependency resolution code.
Move objectstore from lwr/ into galaxy/.

It is not PEP-8 compliant and bringing in more and more of Galaxy anyway.

Other smaller PEP-8 and unit test fixes.
Allow launch to take a list of serialized tool requirements.

Build a Galaxy 'DependencyManager' in LwrApp and utilize it in managers to resolve these requirements.

A more correct approach would probably be to read the tool on LWR side, but this mode is potentially very useful for LWR instances not bound to toolboxes (i.e. every LWR instance I know about).