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.

graph/mock_ts.go

@@ -0,0 +1,58 @@
+// 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 graph
+
+// A quickly mocked version of the TripleStore interface, for use in tests.
+// Can better used Mock.Called but will fill in as needed.
+
+import (
+	"github.com/stretchrcom/testify/mock"
+)
+
+type TestTripleStore struct {
+	mock.Mock
+}
+
+func (ts *TestTripleStore) GetIdFor(s string) TSVal {
+	args := ts.Mock.Called(s)
+	return args.Get(0)
+}
+func (ts *TestTripleStore) AddTriple(*Triple)       {}
+func (ts *TestTripleStore) AddTripleSet([]*Triple)  {}
+func (ts *TestTripleStore) GetTriple(TSVal) *Triple { return &Triple{} }
+func (ts *TestTripleStore) GetTripleIterator(s string, i TSVal) Iterator {
+	args := ts.Mock.Called(s, i)
+	return args.Get(0).(Iterator)
+}
+func (ts *TestTripleStore) GetNodesAllIterator() Iterator   { return &NullIterator{} }
+func (ts *TestTripleStore) GetTriplesAllIterator() Iterator { return &NullIterator{} }
+func (ts *TestTripleStore) GetIteratorByString(string, string, string) Iterator {
+	return &NullIterator{}
+}
+func (ts *TestTripleStore) GetNameFor(v TSVal) string {
+	args := ts.Mock.Called(v)
+	return args.Get(0).(string)
+}
+func (ts *TestTripleStore) Size() int64 { return 0 }
+func (ts *TestTripleStore) DebugPrint() {}
+func (ts *TestTripleStore) OptimizeIterator(it Iterator) (Iterator, bool) {
+	return &NullIterator{}, false
+}
+func (ts *TestTripleStore) MakeFixed() *FixedIterator {
+	return NewFixedIteratorWithCompare(BasicEquality)
+}
+func (ts *TestTripleStore) Close()                                 {}
+func (ts *TestTripleStore) GetTripleDirection(TSVal, string) TSVal { return 0 }
+func (ts *TestTripleStore) RemoveTriple(t *Triple)                 {}