Connected the Wisdom class with the City and Institution classes
Added the Author member to the Wisdom class
Added a simple layout for the Wisdom row

Added a simple layout for displaying the Wisdom class in an Adapter.
Changed the Summary member in the Wisdom class into Wisdom

Renamed the Summary column into Wisdom. It's going to represent  the
whole text of the wisdom. The summary will be a fixed amount of
characters extracted from this text in the adapter.