Add PDoubleArrayOutput protocol
Add to-double-array function
Add default PDoubleArrayOutput implementation
Implement DoubleArrayOutput for double arrays
Double array compliance tests
Misc tidying
Fix compliance tests for double array ops
Misc tidying
[maven-release-plugin] prepare release core.matrix-0.0.9
[maven-release-plugin] prepare for next development iteration
Fix group-id to net.mikera
Remove group-id so that net.mikera is used by default