Distance Between Tool 1.2.1 for Maya (maya script)

Changelog Version 1.1
- Split GUi into 2 files
- Updated functionality to work with edges, faces, components
- Updated options to view in diferent units

Changelog Version 1.2
- Split Maya Distance from HUD
- Added New Distance Movement Option
- auto HUD changes when option Menu is changed

Changelog Version 1.2.1
- Updated code to alter default units easily