This allows the example to also show how to work on systems with
different libdir settings (e.g., Debian multiarch or Red Hat multilib)
rather than a regular `lib` directory.
* Move sections to be same level as Introduction in "Using Dependecies"
* Rename "Importing Exporting Targets" to "Importing Exporting Guide"
* Add an Introduction header to the Tutorial and Importing Exporting Guide
Ben Boeckel