Fix SphinxProvider to use new date format, and add context to people.
Currently uses number of roles rather than number of distinct shows.
Use shows rather than roles in context.
Pull in upstream changes
Merge branch 'master' of github.com:sigilion/camdram and fixed merged conflicts #120

Conflicts:
	app/config/config.yml
	src/Acts/CamdramBundle/Entity/Person.php
	src/Acts/CamdramBundle/Entity/Show.php
	src/Acts/CamdramBundle/Search/SphinxProvider.php