add models for keystone configuration
add token providers for dependency injection
first step to extract http logic from Client class
add constructor overload which accepts keystone params, replace string token field with TokenContainer
add one more model for keystone
remove models for keystone v3
add hardcoded support of keystone 2 token obtaining
Merge branch 'v3' into keystone
Merge branch 'v3' into keystone
extract all data to iron.json, add test
add `keystone` readme section
add `keystone` readme section
remove debug info, improve README
Merge pull request #50 from pyeremenko/keystone

Implement keystone v2 auth feature in mq
fix testPostMultipleMessagesAndIdsShouldNotBeNull test
Merge pull request #51 from pyeremenko/keystone

fix testPostMultipleMessagesAndIdsShouldNotBeNull test
Merge branch 'v3' into keystone

Conflicts:
	src/test/java/io/iron/ironmq/IronMQTest.java
add iron.json.example
add iron.json.example
Merge pull request #59 from pyeremenko/keystone

Keystone in iron.json