Added /UA route for retrieving user-agent header

The /UA route will render the user-agent header as text
Added /hello?name=<name> route for saying hello

Added a route that says hello using a query string parameter
for providing a name.
Added /add route for adding numbers

Added a /add route that takes a one and two parameter.  These
numbers will be added and reported. Values are checked for
numeric value before use.