GitLab

(And add it to Emulab, POWDER, and Apt.)

- Address David's feedback and move the shell section further down
- Change how the shell alternative to changing a role from the console is introduced

- Major improvements in the Apache section, including more instructions and new screenshots
- First draft of the Final Remarks section
- All code snippets use new the @verbatim{} style (with highlighting for commands)

- Major improvements in the Apache section, including more instructions and new screenshots
- First draft of the Final Remarks section
- All code snippets use new the @verbatim{} style (with highlighting for commands)

- Rename the file to match the updated name of the Chef section
- Add notes about browser warnings, recommended browsers, additional reading
- Imporove motivational statements
- Many fixes and updates in sections before the Apache exercise

There are still lots of warnings from scribble, but they seem
to be harmless; they are about sections that have the same titles
in both files, and I don't know why this would hurt anything.

- More instructions and better structure

- New chapter along with many new screenshots and code-samples