Add travis configuration file and updated README to point to travis status image and link.
Commented out Tire logger line so that it doesn't break specs when the tmp directory doesn't exist.
Add elasticsearch service to travis configuration file.
Add JRUBY_OPTS in travis.yml in order to get JRuby build to work.  Also added Ruby 1.8.7 to travis settings.
Remove Ruby 1.8.7 from travis settings (looks like 1.8.7 is not supported).
Fix README to show correct travis build status image.
Merge branch 'add_travis_ci' of git://github.com/joe1chen/elasticsearch_autocomplete into joe1chen-add_travis_ci