Fixed shell key support to have getCapabilities(), renamed the old capability to align with common naming scheme
Renamed the old capability to _correctly_ align with common naming scheme
Javadoc fix
After all we don't need the supportsKeypairGeneration() method, we only had to read the javadoc to the former getKeyImportSupport(). Doh!
Merge pull request #308 from maksimov/develop

ShellKeySupport fixes