base code for challenge
add logger helpers
add third parameter
rename response ok file to sendOK
rename app.js to server.js
add dependencies for dev && add asyncjs
add swap file in ignore
write model for city
add business logic in suggestions route
add cluster mode for improve performance
convert cities datas to json
add calculate score helper
add helpers for load file in memory
add helper for parse query string
add command line tool for convert .tsv file to .json
update dependenci for calculate_score
add helpers for use memcache
use now async parrallel for initialize application && add cache to suggestions route
use DEBUG process env variable
replace options args