Update README.md file: (#24)

1. Add Batch Loading section to the table of contents.
2. Align numbering format.

Author: roimenashe

README.md

@@ -11,22 +11,23 @@
 6. [Properties](#Properties)
 7. [References to other objects](#References-to-other-objects)
    + 7.1. [Associating by Reference](#Associating-by-Reference)
+     + 7.1.1. [Batch Loading](#Batch-Loading)
    + 7.2. [Aggregating by Embedding](#Aggregating-by-Embedding)
      + 7.2.1. [Versioning Lists](#Versioning-Lists)
-     + 7.2.2 [List Ordinals](#List-Ordinals)
-     + 7.2.3 [The importance of Generic Types](#The-importance-of-Generic-Types)
+     + 7.2.2. [List Ordinals](#List-Ordinals)
+     + 7.2.3. [The importance of Generic Types](#The-importance-of-Generic-Types)
 8. [Advanced Features](#Advanced-Features)
    + 8.1. [Placeholder replacement](#Placeholder-replacement)
    + 8.2. [Subclasses](#Subclasses)
-     + 8.2.1 [Data Inheritance](#Data-Inheritance)
-     + 8.2.2 [Subclass Inheritance](#Subclass-Inheritance)
+     + 8.2.1. [Data Inheritance](#Data-Inheritance)
+     + 8.2.2. [Subclass Inheritance](#Subclass-Inheritance)
    + 8.3. [Custom Object Converters](#Custom-Object-Converters)
 9. [External Configuration File](#External-Configuration-File)
-   + 9.1 [File Structure](#File-Structure)
-     + 9.1.1 [Key Structure](#Key-Structure)
-     + 9.1.2 [Bin Structure](#Bin-Structure)
-     + 9.1.3 [Embed Structure](#Embed-Structure)
-     + 9.1.4 [Reference Structure](#Reference-Structure)
+   + 9.1. [File Structure](#File-Structure)
+     + 9.1.1. [Key Structure](#Key-Structure)
+     + 9.1.2. [Bin Structure](#Bin-Structure)
+     + 9.1.3. [Embed Structure](#Embed-Structure)
+     + 9.1.4. [Reference Structure](#Reference-Structure)
 10. [Virtual Lists](#Virtual-Lists)
 
 # Motivation and a simple example