Restore color display of STL files

Add `urdf-visualizer.cacheMesh` setting: enable/disable mesh caching

Fix Bug: The list fails to display when there is a `.` in the Joint name

Update Readme

Update README

Fix bug: cannot load mesh files using `file://$(find <package_name>)`…

… syntax in xacro files

Fix bug: Sometimes the model does not load when opened for the first …

…time

Add display for Joint axis, highlighted Joint and Link frames when ho…

…vering

Update version tag

Add masurement of coordinate values