v0.3.0

• The API of the Akkeeper application launcher has been reworked and is now available to be used by a client code to submit Akkeeper applications programmatically.
• Support for non-local URIs (eg HDFS) for resources that are required to submit the Akkeeper application (like user jar, Akkeeper fat jar, etc).
• API for a graceful shutdown of the Akkeeper Master instance. Shutdown of the master instance leads to a shutdown of an entire application.
• The YARN local resource manager has been revised and simplified significantly.
• Bug fixes.