Rewrite the view filter service to make it easier to verify and fix a
bug in the handling of "any" queries:

The input filter object representing the parsed search query is
translated into a tree of filter primitives, where each primitive is
either a TermFilter that tests whether an annotation matches a single
(field, term) or a BinaryOpFilter that combines other filters using AND
or OR operators. The list of annotations are then matched against the
tree's root filter.

This system allows a nicer representation of "any" field queries by
expanding a query such as "foo bar" into:

  (quote:foo OR text:foo OR ...) AND (quote:bar OR text:bar OR ...)

In the process a mistake was uncovered in a test case for the "any"
filter which incorrectly allowed the previous broken implementation to
pass.