chore(assets): ignore precompiled assets
chore(db): separate dev and prod db providers
chore(reps): allow sprockets patch releases
fix(build): better support cross-platform dev

remove references to windows specific gems, etc
fix(build): update to latest gems
feat(db): use sqlite3 in development
chore(heroku): add required gem
fix(haml): include haml always
Merge pull request #1 from elovelan/Postgres

stupid gem crap