Add OpenSim::Component overload to OpenSim::Exception

[adamkewley]

Adds an OpenSim::Component overload to OpenSim::Exception that uses the component's absolute path instead of the component's name.

The utility of doing this is that it's easier to figure out which Component is giving a headache when an OpenSim::Exception is thrown. When it's just the name, it can take a little more effort to figure out where the troublesome component is in the wider component tree (e.g. in a larger model).

Brief summary of changes

• Adds an OpenSim::Component overload to OpenSim::Exception that prints the absolute path to the component, rather than just the Component's name.
• Uses the overload in PropertyException, which is a very common exception source when building a model (e.g. when editing XML files or editing models, this exception pops up, and it's useful to know where the errant property is).

Testing I've completed

• Manually ran it while developing opensim-creator

Looking for feedback on...

CHANGELOG.md (choose one)

• TODO

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This change is 

[adamkewley]

The failures are related to a missing declspec(dllimport) or similar - needs to be fixed

[adamkewley]

This should now be ready for review+merging, if it's an agreeable change!

[aymanhab]

Reviewed 3 of 5 files at r1, 2 of 2 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @adamkewley)