Add the section "Working with Files"

Add some examples for working with files.
Add the section "Committing Changes"

Add some examples for committing changes and requesting logs.
Add the section "Changing the History"

Add some examples to work with and to change the repositorie's history.
Add the section "Branching"

Add some examples how to work with branches.
Add the section "Tagging"

Add some examples how to work with tags.
Add the section "Remote Repositories"

Add some examples how to work with remote repsitories.
Add the section "Patches"

Add some examples how to work with patches.
Add the section "Advanced Syntax"

Add some examples how to work with advanced syntax such as the "^", "~" and
the ".." notation.
Add the section "Stash"

Add some examples how to work with the git stash.