Refactoring, move codes to sub dirs.
Config shall be used in backup later.
Fix package.json config.
Add python install package.
Add util class.
Update util & add crawler class.
Update crawler data format.
Fix log message.
Add more tool function.
Move previous logics from Gruntfile.js to this file, need to be fixed later.
Add empty data json files.
Save.
Remove page number.
Add tool libs.
Save.
Save.
Save.
Save.
List page crawler done.
Fix bug.