message: update numbering to headers
diff: @@ -106,7 +106,7 @@ User Guides on Exchange Deposit Account:
  ### Account Balance
  The Account Balance module has two services:
  -1. Account Balance Service
  +#### 1. Account Balance Service
  This service provides a method to register [assets](../user-guide-glossary.md#asset) to a user:
  ```
  private assetSources = Array<IAccountableAsset>();
  @@ -128,7 +128,7 @@ This service provides a method to register [assets](../user-guide-glossary.md#as
  The remaining methods in the class use the assetSources Array to calculate a user's available and locked assets, and to return their current asset amounts.
  -2. Account Balance Asset Service
  +#### 2. Account Balance Asset Service
  This service returns a users locked and available assets.
  **This class is the base for all of the Accounting Services in the Exchange's modules.**
  