support to include chunks from default preset in external presets

[skyper]

I did try to import the chunk for surface=* in an external preset but it does not work.

Would be nice to use chunks from default preset and also to be able to link to one of its items.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2014-05-20 01:35:44
Last Changed Author: simon04
Revision: 7146
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2014-05-19 18:17:18 +0200 (Mon, 19 May 2014)
Last Changed Rev: 7146

Identification: JOSM/1.5 (7146 en) Linux Debian GNU/Linux 7.5 (wheezy)
Memory Usage: 199 MB / 882 MB (110 MB allocated, but free)
Java version: 1.7.0_55, Oracle Corporation, OpenJDK 64-Bit Server VM
Java package: openjdk-7-jre:amd64-7u55-2.4.7-1~deb7u1
VM arguments: [-Djosm.home=.josm-test/]
Program arguments: [--language=en]
Dataset consistency test: No problems found

Plugin: tagging-preset-tester (30416)