Features - Githubissues

This Pull Request contains the following features:

Added option to remove empty Asset Groups;
Added option to automatically create groups if they doesn't exist;
Added path parsing allowing dynamically named groups;
Added option to define if labels from ruleset are added or replace the current ones;
Some improvements to tooltips and method descriptions.

Each commit contains the code for each of those features. I can break this into different pull requests if necessary.

favoyang / unity-addressable-importer