Initial commit

Add README.
Add license

Add LICENSE file.
Update README with license information.
Update README with app description

Add description of the core tasks of the app.
Update README layout

Break app description in paragraphs.
Emphasise keywords.
Update README with reference to wiki

Add reference to wiki for detailed information.
Update README GPLv3 logo

Add link to "A Quick Guide to GPLv3" to GPLv3 logo.