polish branching slides; #2
add content and links for rubygems content; #2
remove References slide-- redundant and difficulat to maintain; #2
add outro notes; #2
describe CatalogModels as a Rubygem; #2
revise intro slide notes; #2
revise Field-Catalog-apps slide, add notes; #2
Merge branch 'feature-2-sea-conf' into gh-pages