Unit tests for async exception handling
Cancellation test
Successful building with javadoc
POM ready for Maven Central deployment
POM ready for Maven Central deployment
High-performance implementation of Task
AQS-based implementations of Task and ProxyTask.
Merge tag '0.2' into develop

0.2. alpha release
Full test set but Task and ProxyTask may produce dead locks
Full test set but Task and ProxyTask may produce dead locks