Update README.md

Fix link to blog post "Honeybadger and Capistrano: the metal way"
Merge pull request #16 from terlar/patch-1

Fix blog post link in README.md
Run tests against Ruby 2.0
wat
Update supported versions in README
Bump copyright year
Fixes #3: Rescue from load error when application_controller.rb is missing.
Release 1.6.0
Added a deploy rake task which always loads the Rails environment.
Rails 4 routing fix.
Run tests against 4.0.0.beta1
Don't rescue rake exceptions in generator (creates a false positive in features when an exception occurs)
Merge pull request #20 from benubois/rails_4

Rails 4 routing fix.
Make travis install only Rails 2.3 and Rack appraisals.
Release 1.6.1
Correct changelog
1.6.1 backported