added V2 inventory class

added new class to replace and improve V1 method.
improved dao package

added new java class to hold all SQL queries and only allow this packAge
to run Oracle queries.
improved  query method.

It now queries the db filtering by brand, and also uses the new dao
package class to perform the query.
added example of PathParam

Example of the usage of PathParam and also a (commented) method to
handle an error message at root level, had the QueryParam method not
been there.
added method to search using two parameters

added method to search by brand and item number.
Using protection against SQL injection.
new service to search inventory bay brand and item number.

The new service demonstrates the use of PathParam, where you use the URL
for the search, going from the more general (brand) to the more specific
(item number within that brand).
added ep5 to readme.html

added ep5 to readme.html