Introduced Bundler to manage dependencies
Removed :check_dependencies (couldn't find it anywhere in the repo)
Removed deprecated Rdoc Task
[testfix] Fixed the test that didn't expect an array response from ICalendar.decode
Replaced Enumerable::Enumerator with Ruby 1.9.3's enum_for
Deprecated tests for dependencies that are no longer available

the 'atom' gem is not Ruby 1.9.3-compatible; Sinatra has dropped 'sinatra/test' somewhere along the way
Added 'turn' to beautify test output
Specified that Vcard decoding is ASCII-8BIT (rather than UTF-8, which Ruby 2.0 assumes by default)
Fixed a test that expected "cannot modify frozen object" to be a TypeError (it is now a RuntimeError)
Amended how Vpim reports its version programmatically