put all prices inside price:{} blocks

all Sand, Castle, GlassBlock properties moved inside price blocks in
preparation for further refactoring
refactor Molpy.Boost

get rid of a lot of this.prop = args.prop calls
reorganized and added comments
a little more tidying of Molpy.Boost
refactor Molpy.Badge

remove lots of this.prop = args.prop calls
reorganize and add comments
Merge branch 'master' into refactor
update readme
don't have to use Molpy.extend anymore, YAY!

moved temporal rift img stuff into the boost's creation.
Merge pull request #767 from LucidCrux/refactor

Refactor + readme