+soonest:
+ x cran2deb user
+ - build all archs of same package in one go
+ x strip all bundle support out
+
+sooner
+ - deal with growing database: prune things.
+ - put build log into another table
+ - add table to mark which packages need xvfb-run; only use xvfb-run for those
+ (and only do those sequentially).
+
+later:
+ - split up dependency structure to support building under different distributions