-Add travis configuration file (tests rubies 1.8.7, 1.9, 2.0, and rbx 1.9 mode).
-Fixes for unit tests breaking under Ruby 1.8.7.
-Updated gemspec to add check for signing key so that we can also build unsigned gem.
-Add travis build status image to README.rdoc.
-Add travis configuration file (tests rubies 1.8.7, 1.9, 2.0, and rbx 1.9 mode). -Fixes for unit tests breaking under Ruby 1.8.7. -Updated gemspec to add check for signing key so that we can also build unsigned gem. -Add travis build status image to README.rdoc.