add optional flag to disable Nagle
add optional flag to disable Nagle

add option to Connect that disables Nagle's Algorithm -- sets
TCP_NODELAY on the socket.

yeyinzhu3211/PyMySQL,PyMySQL/PyMySQL,MartinThoma/PyMySQL,yeyinzhu3211/PyMySQL,pymysql/pymysql,PyMySQL/Tornado-MySQL,nju520/PyMySQL,anson-tang/PyMySQL,pulsar314/Tornado-MySQL,wraziens/PyMySQL,modulexcite/PyMySQL,mosquito/Tornado-MySQL,xjzhou/PyMySQL,shaun-jss/PyMySQL_py3k,lzedl/PyMySQL,boneyao/PyMySQL,Geoion/Tornado-MySQL,jheld/PyMySQL,eibanez/PyMySQL,eibanez/PyMySQL,xjzhou/PyMySQL,lzedl/PyMySQL,wraziens/PyMySQL,Ting-y/PyMySQL,jwjohns/PyMySQL,NunoEdgarGub1/PyMySQL,methane/MyKaze,DashaChuk/PyMySQL,aio-libs/aiomysql,methane/PyMySQL,shaun-jss/PyMySQL_py3k