rename "Levels" to "Packages"
-----------------------------
we will abstract levels as packages for now and just name them as such "Diamond Sponsorship Level"

Benefits: minimum_level -> package_only
---------------------------------------
rather than specifying a minimum level, these benefits should be selectable only via choosing a package

Benefits: add "new" flag
------------------------
this should render a "New For This Year" badge next to benefits where selected

Benefits: "soft" capacities
---------------------------
for future implementation, some capacities are soft in the sense that we will allow people to "register interest" when they are exhausted