- Updated existing system installer diagram. ...

- Added document history.

- Added diagrams for existing system install and reconfiguration. ...

- Completed sections on existing system install and reconfiguration.
- Changed diagrams to proper figures.
- Added note about not configuring repository look and feel.
- Fixed spelling.
- Tweaked various bits of text.

- Added makefile. ...

- Changed architecture section to typical usage scenarios and added
  initial text.
- Added diagram of bare metal installer scenario.