Add default level name. Refactoring for essences.
Add: level task, work with git, levels views parser.
Add level assets functionality
Add creating new level functionality
Add tasks for future work.
Add task about js bridge.
Update README.md
Big fixes for work with levels
Default level tree method and create asset file if not exist
init fixes
create asset file if not exist in level append
Update Readme and Changelog
Fix conflicts