setup.py: mention that we support PyPy. See GH-2213.
setup.py: mention that we support PyPy. See GH-2213.

umrashrf/scrapy,eLRuLL/scrapy,wujuguang/scrapy,Ryezhang/scrapy,kmike/scrapy,Ryezhang/scrapy,ArturGaspar/scrapy,kmike/scrapy,dangra/scrapy,elacuesta/scrapy,ssteo/scrapy,umrashrf/scrapy,eLRuLL/scrapy,Ryezhang/scrapy,ArturGaspar/scrapy,wujuguang/scrapy,pablohoffman/scrapy,ssteo/scrapy,dangra/scrapy,pablohoffman/scrapy,ArturGaspar/scrapy,pawelmhm/scrapy,pablohoffman/scrapy,elacuesta/scrapy,elacuesta/scrapy,pawelmhm/scrapy,finfish/scrapy,scrapy/scrapy,umrashrf/scrapy,wujuguang/scrapy,starrify/scrapy,finfish/scrapy,finfish/scrapy,scrapy/scrapy,starrify/scrapy,eLRuLL/scrapy,dangra/scrapy,ssteo/scrapy,pawelmhm/scrapy,kmike/scrapy,scrapy/scrapy,starrify/scrapy