Add config section

Add a config section that contains some simple configuration examples.
Add the section "Getting a Repository"

Add some examples how to get a git repository.
Add .gitignore

Add the rule to ignore all files ending with ~, e.g. temporary emacs files
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.