Update DevNote and Fix organize imports

- Update developers' note
- Fix organise imports keep the old (invalid) package declaration
Merge pull request #36 from Mause/develop

Cleanup is_jdk_dir
Reformat README and more notes
Merge branch 'master' into develop
Fix test case error
Fix build error message

- Fix build consider warnings as errors
- Update .gitignore
- Update DevNote
Add output target group settings

- Add build and run output target group settings
- Organize imports now show more readable text
- Simplify domain name
Update news and coding guideline
Create now select "Class" as default

- Create now select "Class" as default
- Add class ideas for class concepts
- Change features priority in DevNote
Update coding guideline
Fix invalid logic and proper traceback display
New snippet prototype format
Merge branch 'master' into develop
Javatar first release

- Build logs and output consoles can be show in different groups
- Create section now select "Class" as default
- Fix invalid logic and proper traceback display
Remove developer files
Javatar first release
Restore back developer files
Add settings key bindings