polling: implemented new protocol
Release 0.5.0
travis: end support for 0.6
test: moved jsonp tests into own file
added tests for callbacks and buffering
changed test to test callbacks in order
more extensive tests for executing callbacks in order
changed test to listen to `flushComplete`
changed flushComplete to flush
Add Version Badge to README
Merge pull request #158 from rykov/master

Add Version Badge to README
added test for client-side buffer cleanup
remove  from tests
package: for travis
Merge pull request #157 from albertyfwu/bug136_tests

added tests for callbacks and buffering
Merge branch 'master' of github.com:/LearnBoost/engine.io
Fix typos and use consistent capitalization
Merge pull request #162 from mscdex/patch-1

Fix typos and use consistent capitalization