use rabin fingerprinting for a chunker

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

implement rabin fingerprinting as a chunker for ipfs

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

vendor correctly

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

refactor chunking interface a little

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

work chunking interface changes up into importer

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

move chunker type parsing into its own file in chunk

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

merkledag_test.go

@@ -163,9 +163,9 @@ func runBatchFetchTest(t *testing.T, read io.Reader) {
 		dagservs = append(dagservs, NewDAGService(bsi))
 	}
 
-	spl := &chunk.SizeSplitter{512}
+	spl := chunk.NewSizeSplitter(read, 512)
 
-	root, err := imp.BuildDagFromReader(read, dagservs[0], spl, nil)
+	root, err := imp.BuildDagFromReader(dagservs[0], spl, nil)
 	if err != nil {
 		t.Fatal(err)
 	}