make it use the file db
Merge branch 'master' of https://github.com/Joycc/NodeJS_Express_Redis_User_Login

Conflicts:
	node_modules/sqlite3/node_modules/node-pre-gyp/node_modules/nopt/.npmignore
	node_modules/sqlite3/node_modules/node-pre-gyp/node_modules/nopt/LICENSE
add session