Refactoring: move query tree to deb package.
MatchesDependency should check on Provides: as well.
Fix bug with special chars handling in strings, detect package key queries,
arch condition for dependency-like queries.
PkgQueries, concept of 'Searchable', rewrite Filter using PackageQueries.
Rename s/Searchable/Fast/
Fix bug with matching in Search method.
Switch aptly repo move/copy/import/remove to use new filters based on queries.