Signing manifesto

I asked @PjotrP at the end of his BOSC 2014 talk if people *aspiring* to these goals should sign, he said yes. See http://video.open-bio.org/video/28/small-tools-for-bioinformatics or https://www.youtube.com/watch?v=8jHbvClB1i8&feature=youtu.be time point 13:48 to 14:02, "It is a declaration of intention".
Merge pull request #39 from peterjc/patch-1

Signing manifesto