v1.0.0: Merge pull request #2 from JoeKn/Add-Support-For-Delayed-Message-Plug-In

add direct type delayed exchange

0.5.0

Version 0.5.0 introduced concurrent workers and a bunch of housekeeping changes as follows:

• Removed GO15VENDOREXPERIMENT=1 from Makefile and build command since
  vendor is supported by default after go 1.6
• Set the right Rex version
• Added GoDoc to Rex
• Added GoDoc status to README
• Added the missing comments reported by go vet in rabbit package
• Added unit tests for logger
• Added docs for cmd and rabbit packages
• Added new interfaces and structs that help unit test some amqp funcs
• Moved os.Exit() call out of rabbit package
• Changed to concurrent worker

0.1.0

Rex v0.1.0 released, hurrah! What a milestone.