Eric Walker added Pseudomonas to Pseudomonadaceae, and added Pseudomonadaceae to Pseudomonadales

Eric Walker added Pseudomonadaceae to Pseudomonadales, and added Pseudomonadales to Gammaproteobacteria

Eric Walker added Pseudomonas aeruginosa and a number of links to Pseudomonas, and added Pseudomonas to Gram-negative bacteria and Pseudomonadaceae