Fixes for v1.2
Small fixes mainly, and a major one regarding dependencies handling.
- Fixed the warning generated by Unity when creating Blend Trees.
- The Particle tool now handle the item scale correctly.
- Minor translation updates.
- The Japanese part of the README has been revamped and is now on-par with the English part (I still think it's broken though).
- The README was restructured in order to showcase the tool to new users first, and talk about gory details last.