Reorganize to go get will work

This makes almost no changes to source, but touches every almost file.

Also fixes error in gremlin test code.

load.go

@@ -0,0 +1,81 @@
+// Copyright 2014 The Cayley Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cayley
+
+import (
+	"os"
+
+	"github.com/barakmich/glog"
+
+	cfg "github.com/google/cayley/config"
+	"github.com/google/cayley/graph"
+	"github.com/google/cayley/graph/mongo"
+	"github.com/google/cayley/nquads"
+)
+
+func CayleyLoad(ts graph.TripleStore, config *cfg.CayleyConfig, triplePath string, firstTime bool) {
+	switch config.DatabaseType {
+	case "mongo", "mongodb":
+		if firstTime {
+			loadMongo(ts.(*mongo.MongoTripleStore), triplePath)
+		} else {
+			LoadTriplesFromFileInto(ts, triplePath, config.LoadSize)
+		}
+	case "rethink", "rethinkdb":
+		LoadTriplesFromFileInto(ts, triplePath, config.LoadSize)
+	case "leveldb":
+		LoadTriplesFromFileInto(ts, triplePath, config.LoadSize)
+	case "mem":
+		LoadTriplesFromFileInto(ts, triplePath, config.LoadSize)
+	}
+
+}
+
+func loadMongo(ts *mongo.MongoTripleStore, path string) {
+	tChan := make(chan *graph.Triple)
+	go ReadTriplesFromFile(tChan, path)
+	ts.BulkLoad(tChan)
+}
+
+func ReadTriplesFromFile(c chan *graph.Triple, tripleFile string) {
+	f, err := os.Open(tripleFile)
+	if err != nil {
+		glog.Fatalln("Couldn't open file", tripleFile)
+	}
+
+	defer func() {
+		if err := f.Close(); err != nil {
+			glog.Fatalln(err)
+		}
+	}()
+
+	nquads.ReadNQuadsFromReader(c, f)
+}
+
+func LoadTriplesFromFileInto(ts graph.TripleStore, filename string, loadSize int) {
+	tChan := make(chan *graph.Triple)
+	go ReadTriplesFromFile(tChan, filename)
+	tripleblock := make([]*graph.Triple, loadSize)
+	i := 0
+	for t := range tChan {
+		tripleblock[i] = t
+		i++
+		if i == loadSize {
+			ts.AddTripleSet(tripleblock)
+			i = 0
+		}
+	}
+	ts.AddTripleSet(tripleblock[0:i])
+}