Get lookup from wrapper, too
Pass #lookup the current graph
Much more power from route_conditions if it knows the current graph
Filters always need to know the current graph
Optionally raise an exception if the graph is going to perform a full scan
Bump to 1.4.0 since route_conditions requiring the graph as an argument is a breaking change
Merge remote-tracking branch 'origin/master' into lookup

* origin/master:
  gitignore
  count deleted rows
  Feedback from xml builder
  export without a graph
Merge branch 'master' into lookup

* master:
  Fix up the test suite
update some tests
Merge pull request #55 from pangloss/lookup

:heart_eyes_cat: