Add data.core/blob-type helper function.
Remove index.core ns.
Add erasegit dc method to BlobStore protocol.
Change names in index.search.brute engine.
Split index protocol into three sections.
Add tests for MemoryIndex.
Migrate code from index to search ns.
Remove vault.data.core ns, rename digest to content.
Rename algorithm vars in blob.content ns.
Remove data.core var imports.
Remove entity.core ns.
Move defs from search ns to dev notes.
Split entity.schema ns out of entity.tx.
Simplify entity ns imports.
Add doc build script.
Merge branch 'ns-refactor' into develop