Merge pull request #49 from pyeremenko/master

add long polling support
[maven-release-plugin] prepare release ironmq-0.0.19
[maven-release-plugin] prepare for next development iteration
changing version in readme
Enables a `pathPrefix` option in Cloud for special hosts.
Initialized pathPrefix.
Added full string URL option for Cloud.
slightly change Cloud class
remove trailing slash
small fix
Merge pull request #53 from iron-io/path-prefix

Enables a `pathPrefix` option in Cloud for special hosts.
Merge pull request #52 from pyeremenko/v3

Actualize  features related with push-queues
Merge branch 'master' into v3

Conflicts:
	README.md
	pom.xml
	src/main/java/io/iron/ironmq/Client.java
	src/main/java/io/iron/ironmq/Cloud.java