Started writing test for OctopusProperties.
Merge remote-tracking branch 'origin/develop' into feature/testOctopusProperties
Replace OctopusRuntimeException with UnsupportedOperationException, because some methods immutable object are unsupported.

Added more tests.
Add test for getLongProperty, getShortProperty, getDoubleProperty, getFloatProperty .
Merge remote-tracking branch 'origin/develop' into feature/testOctopusProperties
Merge pull request #23 from NLeSC/feature/testOctopusProperties

Added unit tests for OctopusProperties