Various fixes and tweaks, though, there are still serious problems in the node builder. Have done some debugging and am homing in on some of them.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2456 86ba831e-150c-0410-ab35-e06eaae15ed9
~~~!!! >:o *DYNABSPS* o:< !!!~~~

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2457 86ba831e-150c-0410-ab35-e06eaae15ed9
Critical bug fix that caused corruption of polynode "owned" lists (and reveals a serious weakness in DLListItem)

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2458 86ba831e-150c-0410-ab35-e06eaae15ed9
Experimental tweak: add a bit of cost to non-orthogonal lines for selection as polynode partitions.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2459 86ba831e-150c-0410-ab35-e06eaae15ed9
Dead code removal and comment changes only.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2460 86ba831e-150c-0410-ab35-e06eaae15ed9