fix lots of typos and grammar in FAQ
fix lots of typos and grammar in FAQ

twosigma/beaker-sharing-server,thomasyu888/nbviewer,imsparsh/nbviewer,christophelec/nbviewer,Sage-Bionetworks/nbviewer,franblas/beaker-sharing-server,franblas/beaker-sharing-server,iamjakob/nbviewer,bollwyvl/nbviewer,christophelec/nbviewer,Jay-Oh-eN/nbviewer,thomasyu888/nbviewer,twosigma/beaker-sharing-server,Sage-Bionetworks/nbviewer,franblas/beaker-sharing-server,imsparsh/nbviewer,AlfiyaZi/nbviewer,Jay-Oh-eN/nbviewer,AlfiyaZi/nbviewer,roxyboy/nbviewer,franblas/beaker-sharing-server,iamjakob/nbviewer,twosigma/beaker-sharing-server,roxyboy/nbviewer,twosigma/beaker-sharing-server,bollwyvl/nbviewer