update asp.net packages
just say no to entity framework
update packages
add StackExchange.Redis and a Common project
remove old packages
finish removing medium/rangy, updating packages, and getting references
to Common enough to build
add ShortUrl model/table
default route for Index()
empty container config
move common interfaces to Common
rename BlogOne finally.  Although now I'm starting to now like this name
too much.  Maybe just "Solo"?  blah.  shed painting later.