Rake task `feedback:report` for outputting the latest feedback

(Followup for #63 @alexbotsford @redsquirrel)

![](https://photos-6.dropbox.com/t/0/AAAU3o14Kj1HJFBCCf7gJKg4Jb1LOaLy10LkqlB2hKq-_g/12/12686470/png/1024x768/3/1392937200/0/2/Screenshot%202014-02-20%2015.54.37.png/9PbCnrYad_DuvFvko25NJUFUyaSPCkq8KfPaeNr14P8)