modify package.json
sequelize integration
add item.js and user.js
remove unrelated file
comment, clean, psql integration
include configuration file in config/index.js
tell .gitignore to ignore all files in config directory
unstage config
fix config
Update index.js
update .gitignore
Merge branch 'sqlz-integration' of https://github.com/jxcube/gom-backend into sqlz-integration
update .gitignore
test
try to fix config file
Merge branch 'sqlz-integration'

sequelize integration done.

TODO: fix the configuration file.