Fixes #311: -f can load package.json files
Fixes #311: -f can load package.json files

cskeppstedt/coffeelint,sgentle/coffeelint,emorikawa/coffeelint-cjsx,sagemathinc/coffeelint-cjsx,machadoit/coffeelint,AsaAyers/coffeelint,lydell/coffeelint,mitar/coffeelint,swang/coffeelint,clutchski/coffeelint