update go-git api (#120)

Author: smola

blobs.go

@@ -39,7 +39,7 @@ func (r *blobsTable) TransformExpressionsUp(f func(sql.Expression) sql.Expressio
 }
 
 func (r blobsTable) RowIter() (sql.RowIter, error) {
-	bIter, err := r.r.Blobs()
+	bIter, err := r.r.BlobObjects()
 	if err != nil {
 		return nil, err
 	}

commits.go

@@ -45,7 +45,7 @@ func (r *commitsTable) TransformExpressionsUp(f func(sql.Expression) sql.Express
 }
 
 func (r commitsTable) RowIter() (sql.RowIter, error) {
-	cIter, err := r.r.Commits()
+	cIter, err := r.r.CommitObjects()
 	if err != nil {
 		return nil, err
 	}

tags.go

@@ -44,7 +44,7 @@ func (r *tagsTable) TransformExpressionsUp(f func(sql.Expression) sql.Expression
 }
 
 func (r tagsTable) RowIter() (sql.RowIter, error) {
-	tIter, err := r.r.Tags()
+	tIter, err := r.r.TagObjects()
 	if err != nil {
 		return nil, err
 	}

tree_entries.go

@@ -43,7 +43,7 @@ func (r *treeEntriesTable) TransformExpressionsUp(f func(sql.Expression) sql.Exp
 }
 
 func (r treeEntriesTable) RowIter() (sql.RowIter, error) {
-	cIter, err := r.r.Trees()
+	cIter, err := r.r.TreeObjects()
 	if err != nil {
 		return nil, err
 	}