Clarify that we'll explain how to create promises later.
Clarify that we'll explain how to create promises later.

Closes #344.

linalu1/q,darkdragon-001/q,CozyCo/q,rasata/q,ShopCo/q,IlianStefanov/q,signpost/q,miamarti/q,ajunflying/q,aramk/q,mcanthony/q,behind2/q,b12consulting/q,jymsy/q,zhangwenquan/q,liwangbest/q,lidasong2014/q,kriskowal/q,100star/q,homer0/q,pwmckenna/q,willsmth/q,cgvarela/q,potato620/q,X-Bird/q,rasata/q,Muffasa/q,harks198913/q,gustavobeavis/q,Muffasa/q,X-Bird/q,bnicart/q,lvdou2518/q,IbpTeam/node-q,IlianStefanov/q,willsmth/q,behind2/q,greyhwndz/q,linalu1/q,dracher/q,jymsy/q,cgvarela/q,welbornio/q,STRd6/q,lvdou2518/q,greyhwndz/q,SarunasAzna/q,criferlo/q,yizziy/q,gorcz/q,homer0/q,manushthinkster/q,npmcomponent/techjacker-q,signpost/q,Zeratul5/q,harks198913/q,manushthinkster/q,welbornio/q,lidasong2014/q,yizziy/q,ajunflying/q,gorcz/q,kevinsawicki/q,gustavobeavis/q,IbpTeam/node-q,b12consulting/q,potato620/q,liwangbest/q,CozyCo/q,ShopCo/q,mcanthony/q,pwmckenna/q,kriskowal/q,bnicart/q,zhangwenquan/q,miamarti/q,dracher/q,criferlo/q,SarunasAzna/q,Zeratul5/q,aramk/q,darkdragon-001/q