Add date_histogram facet
Add date_histogram facet

mouadino/pyes,Fiedzia/pyes,HackLinux/pyes,rookdev/pyes,Fiedzia/pyes,HackLinux/pyes,mavarick/pyes,haiwen/pyes,aparo/pyes,jayzeng/pyes,jayzeng/pyes,haiwen/pyes,jayzeng/pyes,aparo/pyes,rookdev/pyes,haiwen/pyes,mavarick/pyes,Fiedzia/pyes,aparo/pyes,mouadino/pyes,mavarick/pyes,HackLinux/pyes