init docs: go generated welcome dir + files

updated sharness hashes

unixfs/io/dirbuilder.go

@@ -0,0 +1,38 @@
+package io
+
+import (
+	mdag "github.com/jbenet/go-ipfs/merkledag"
+	format "github.com/jbenet/go-ipfs/unixfs"
+	u "github.com/jbenet/go-ipfs/util"
+)
+
+type directoryBuilder struct {
+	dserv   mdag.DAGService
+	dirnode *mdag.Node
+}
+
+func NewDirectory(dserv mdag.DAGService) *directoryBuilder {
+	db := new(directoryBuilder)
+	db.dserv = dserv
+	db.dirnode = new(mdag.Node)
+	db.dirnode.Data = format.FolderPBData()
+	return db
+}
+
+func (d *directoryBuilder) AddChild(name string, k u.Key) error {
+	cnode, err := d.dserv.Get(k)
+	if err != nil {
+		return err
+	}
+
+	err = d.dirnode.AddNodeLinkClean(name, cnode)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (d *directoryBuilder) GetNode() *mdag.Node {
+	return d.dirnode
+}