Removed finalize method from ZipWriter.
Revised try/catch/finally blocks.
Renamed ExtPropsKeys to HookPropsKeys.
Renamed ExtPropsValues to HookPropsValues.
Removed portal property "dl.folder.download.ignore-errors".
Added portal property "dl.folder.download.servlet.context.name".
Moved ZipWriter from package "au.com.permeance.liferay.portlet.util" to "au.com.permeance.liferay.util.zip".