Section is determined by the source, not the url

This change allows for top level html content to exists.

source/inmemory.go

@@ -0,0 +1,34 @@
+package source
+
+import (
+	"bytes"
+	"fmt"
+	"path"
+)
+
+type ByteSource struct {
+	Name    string
+	Content []byte
+	Section string
+}
+
+func (b *ByteSource) String() string {
+	return fmt.Sprintf("%s %s %s", b.Name, b.Section, string(b.Content))
+}
+
+type InMemorySource struct {
+	ByteSource []ByteSource
+}
+
+func (i *InMemorySource) Files() (files []*File) {
+	files = make([]*File, len(i.ByteSource))
+	for i, fake := range i.ByteSource {
+		files[i] = &File{
+			LogicalName: fake.Name,
+			Contents:    bytes.NewReader(fake.Content),
+			Section:     fake.Section,
+			Dir:         path.Dir(fake.Name),
+		}
+	}
+	return
+}