base crawler for boxoffice
#refer to scrapy official doc http://doc.scrapy.org/en/1.0/intro/tutorial.html#crawling
#TODO:
- normalize, date, ateend/capacity, shows/sellout, prices, promoters for relational DB
- switch to django or flask project
#pip req pip install scrapy
#command reference scrapy crawl bo
scrapy crawl bospider -o items.json