Release 0.5.5

Release 0.5.4

Merge pull request amqp-node#475 from squaremo/prep-v0.5.3

Prep v0.5.3

Update for v0.5.2

 - update changelog with PRs since last release
 - more supported versions in README
 - package version bump

Tag for release v0.5.1

Tag for v0.5.0 release

Tag for release of v0.4.2

Tag for release v0.4.1

Tag for release v0.4.0

Tag for npm release v0.3.2