provide friendlier, formatted error message
provide friendlier, formatted error message

Closes #59

samstav/fastfood,rackerlabs/fastfood,rackerlabs/fastfood,brint/fastfood,brint/fastfood,martinb3/fastfood,samstav/fastfood,martinb3/fastfood,rackerlabs/fastfood,martinb3/fastfood,brint/fastfood,samstav/fastfood,samstav/fastfood,martinb3/fastfood,brint/fastfood