Clean up README based on @nextmat comments in #165.
Clean up README based on @nextmat comments in #165.

 - poor explanation of metrics definition - if the README is going to include copy/paste for everything else why not that?
 - for storage current instructions are easily read to suggest that you need both redis/mongo & a relational DB. I don't believe this is the case? I think most people reading the instructions would generate the migration and run it.
 - would be good to link to the identity section of the deeper docs in the README section about identifying users

glioinc/vanity,assaf/vanity,Futurelearn/vanity,CGTrader/vanity,assaf/vanity,mockra/vanity,Mario245/vanity,CGTrader/vanity,glioinc/vanity,mockra/vanity,peterkovacs/vanity,peterkovacs/vanity,peterkovacs/vanity,assaf/vanity,Futurelearn/vanity,Mario245/vanity,Mario245/vanity,Futurelearn/vanity,glioinc/vanity,HealthyDelivery/vanity,HealthyDelivery/vanity,mockra/vanity,HealthyDelivery/vanity,CGTrader/vanity