Update to latest gem versions
remove cruft
Use the most recent, supported hunspell gem

- Hunspell gem doesn't need the native hunspell libraries, so I removed them
Merge branch 'gem-updates'
Add project monitor hook and use local db settings for travis
Merge branch 'update-travis'
Adding file missing from b240b31
Travis is unhappy with the custom database role, so removing
Require ff-hunspell properly
Fix Nokogiri warning
The spell checking doesn't work well, so removing

I'll try to restore some spell checking in future, but the
native hunspell libraries are causing travis errors and it looks like it
will be a complex issue to get them properly deployed on heroku. I
don't think it's working with current deploys.
Merge branch 'remove-hunspell'
Commit .env because it makes sense to have it in dev and test environments
Remove unneeded gems and upgrade some others
Fixing spelling mistake
Include gem that the activeadmin gem needs
Add a more comprehensive .gitignore config
Update to latest patch level for Ruby 1.9.3
Fixes issues with simplecov + spork.

I needed to make some minor changes to the spec_helper.rb file and
restrict simplecov to the 0.7.x branch (there is a bug in the 0.8
branch that has yet to be fixed: https://github.com/colszowka/simplecov

I also took the liberty to update the Gemfile with Ruby19 hash syntax.
Use a content_tag helper for category.description

In category#show the app would throw a NoMethodError on categories with
nil descriptions (this is from db/seeds.rb).  We may also want to add
some example descriptions to the seeds.rb file.