Add an app.get() method, because the set() API is weird

Hello anybody, 

Please review the following commits I made in branch 'nick-get'.

eed864b1af0c511801f7eea72a1d5226c08f2d49 (2013-06-27 18:54:19 -0400)
Add an app.get() method, because the set() API is weird


R=anybody