updated readme with important memory and directory permissions notes, as well as contributors info.
updated readme with important memory and directory permissions notes, as well as contributors info.

DragonBe/opencfp-azure,xavierleune/cfp,noahd1/opencfp,phphants/opencfp,mdwheele/opencfp,jugisahunk/200OK_CFP,madisonphp/opencfp,xavierleune/cfp,Acidburn0zzz/opencfp,monoku/opencfp,localheinz/opencfp,PHPBenelux/opencfp,sunshinephp/opencfp,brynary/opencfp,OpenWestConference/opencfp,DevOpsDaysChicago/opencfp,phphants/opencfp,DragonBe/opencfp-azure,MidwestPHP/opencfp_mwphp15,opencfp/opencfp,sunshinephp/opencfp,DallasPHP/opencfp,PHPBenelux/opencfp,zymsys/opencfp,xavierleune/cfp,zhenqing/opencfp,PHPBenelux/opencfp,monoku/opencfp,chrispecoraro/opencfp,opencfp/opencfp,madisonphp/opencfp,zymsys/opencfp,zymsys/opencfp,GrUSP/opencfp,Acidburn0zzz/opencfp,phphants/opencfp,brynary/opencfp,madisonphp/opencfp,monoku/opencfp,OpenWestConference/opencfp,localheinz/opencfp,monoku/opencfp,mdwheele/opencfp,GrUSP/opencfp,DallasPHP/opencfp,DragonBe/opencfp-azure,Acidburn0zzz/opencfp,GrUSP/opencfp,PHPmvd/phpday-cfp,pmeth/opencfp,noahd1/opencfp,MidwestPHP/opencfp_mwphp15,DallasPHP/opencfp,localheinz/opencfp,PHPmvd/phpday-cfp,DragonBe/opencfp-azure,DevOpsDaysChicago/opencfp,PHPBenelux/opencfp,brynary/opencfp,MidwestPHP/opencfp_mwphp15,MidwestPHP/opencfp_mwphp15,OpenWestConference/opencfp,zhenqing/opencfp,phphants/opencfp,DragonBe/opencfp-azure,chrispecoraro/opencfp,pmeth/opencfp,opencfp/opencfp,GrUSP/opencfp,DevOpsDaysChicago/opencfp,mdwheele/opencfp,jugisahunk/200OK_CFP,jugisahunk/200OK_CFP,zhenqing/opencfp,noahd1/opencfp,OpenWestConference/opencfp,localheinz/opencfp,mdwheele/opencfp,sunshinephp/opencfp,pmeth/opencfp