Victor Bogado September 01, 2018:  Quick fix [3115e08]
Victor Bogado September 01, 2018:  This fixes the article on Facet_oriented_programming [d29230b]
Victor Bogado September 29, 2017:  more tweaking. [af2c643]
Victor Bogado September 28, 2017:  More fine tunning on the facet article. [fac55d7]
Victor Bogado September 13, 2017:  Adjustments on the facet page [4e03726]
Victor Bogado September 13, 2017:  Article on Facets. [95b48c4]