Made the GmfComputer more debuggable
Added some total_ordering decorators
Added some tests on the ordering of the IMTs
Merge pull request #225 from gem/debug-event-based

Made the GmfComputer more debuggable
Merge branch 'master' of https://github.com/gem/oq-hazardlib
Merge branch 'master' of https://github.com/preinh/oq-hazardlib