docs(ref): document updates (#110)

* docs(ref): doc page updates

* docs(ref): update doc id link and description

* docs(ref): fix link

* docs(ref): update action

* docs(ref): update doc delete st

* docs(ref): update data create st info

* docs(ref): update document replace info

* docs(ref): update doc object info

* docs(ref): add table links

* docs: misc small updates

* docs(ref): add basic doc transfer st info

* docs(ref): add document purchase and update price st info

Author: thephez

docs/explanations/platform-protocol-state-transition.md

@@ -37,7 +37,7 @@ The following table contains a list of currently defined payload types:
 | Payload Type | Payload Description |
 | - | - |
 | [Data Contract Create](../protocol-ref/data-contract.md#data-contract-create) (`0`) | [Database schema](../explanations/platform-protocol-data-contract.md) for a single application |
-| [Batch](../protocol-ref/document.md#document-submission) (`1`) | An array of 1 or more [document](../explanations/platform-protocol-document.md) or token transition objects |
+| [Batch](../protocol-ref/document.md#document-overview) (`1`) | An array of 1 or more [document](../explanations/platform-protocol-document.md) or token transition objects |
 | [Identity Create](../protocol-ref/identity.md#identity-create) (`2`) | Information including the public keys required to create a new [Identity](../explanations/identity.md) |
 | [Identity Topup](../protocol-ref/identity.md#identity-topup) (`3`) | Information including proof of a transaction containing an amount to add to the provided identity's balance |
 | [Data Contract Update](../protocol-ref/data-contract.md#data-contract-update) (`4`) | An updated [database schema](../explanations/platform-protocol-data-contract.md) to modify an existing application |