Added info about queue_name parameter
Added body parameter description

That one bit me...
Merge pull request #13 from mwawrusch/patch-1

Added body parameter description
Added msg_get method to get a message by ID.
Updated README
Merge pull request #14 from alax/master

Added msg_get method to get a message by ID.
Merge pull request #7 from curana/master

Add information about how to specify a certain queue