Add MANIFEST.in.
Add MANIFEST.in.

lzedl/PyMySQL,modulexcite/PyMySQL,wraziens/PyMySQL,anson-tang/PyMySQL,xjzhou/PyMySQL,eibanez/PyMySQL,mosquito/Tornado-MySQL,Ting-y/PyMySQL,PyMySQL/PyMySQL,eibanez/PyMySQL,pymysql/pymysql,pulsar314/Tornado-MySQL,aio-libs/aiomysql,jwjohns/PyMySQL,nju520/PyMySQL,MartinThoma/PyMySQL,methane/PyMySQL,yeyinzhu3211/PyMySQL,boneyao/PyMySQL,NunoEdgarGub1/PyMySQL,Geoion/Tornado-MySQL,PyMySQL/Tornado-MySQL,wraziens/PyMySQL,lzedl/PyMySQL,xjzhou/PyMySQL,yeyinzhu3211/PyMySQL,jheld/PyMySQL,DashaChuk/PyMySQL