Rename plugin entry point.
Rename metadata module.
Rename save decider module.
Rename automatic saver factory module.
Rename module that represents an Eclipse part.
Rename local listeners and handlers.
Rename save job scheduler.
Refactor EditorContext.

Remove methods that don't belong in the module.
Refactor Factory.

Change the visibility of added methods and remove unused ones.
Rename modules in Preference package.

Make name more consistent.
Updated readme.
Update readme.