Fix indentation
Improve documentation and simplify design

The actual implementation is not yet in sync with the new design.
Add "Fork me on GitHub" ribbon
Improve installation instructions
Provide separate section "Manual Recovery and Checking"
Add donation address
Improve sub title
Small doc improvements
Improve section "Usage"
Improve appearance of remarks
Mention the used SHA algorithm (SHA-1)
Improve order of related projects
Small doc improvements
Improve section "Usage"
Restructure docs
Add spec for maximum number of backups
Clarification
Update copyright notice
Improve command line syntax
Specify how to enable debugging output