Added some new fields to the drugs table and DrugEntity class.  Improved
the display of these fields in the search view.
Added an 'order by name asc' clause to the search query to sort the
results by name.
Resolves #9 and resolves #10.  Added CAS, ATC, UNII columns to the drugs
table in the database.  Added ten example drug records with images.
Resolves #11.  Added brief instructions to README for installation,
database setup and source code development.
Fix for #11 - corrected markup for SQL script in README.
Minor corrections and updates to the README.