Updated with DP's new features for R2 (#413)

New features:
Conditional formatting
Notes
Comments

Author: Svilen-Pavlov

integration/telerik-products/document-processing/spreadprocessing/overview.md

@@ -29,6 +29,8 @@ This library enables you to work with spreadsheet documents – create ones from
 
 * [**Hyperlinks**](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/hyperlink): The API enables you to add, remove, edit and search for hyperlinks in the worksheets of the document.
 
+* [**Conditional Formatting**](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/conditional-formatting): Make it easy to analyze data, find critical issues, patterns and trends by representing the data inside in a user-friendly manner.
+
 * [**Workbook Protection**](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/protection/workbook): Prevents the users from modifying the workbook by adding, removing, renaming or reordering sheets.	
 
 * [**Worksheet protection**](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/protection/worksheet): Restricts the user from modifying the content and structure of the worksheet. Additionally, the model offers protection options that let you choose a set of commands that will be available to the user when protection is enabled.
@@ -69,6 +71,10 @@ This library enables you to work with spreadsheet documents – create ones from
 
 * [**History**](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/history): The document model provides the possibility to maintain a history stack that tracks all changes to the content of the workbook. Each worksheet has its own history stack.
 
+* [**Comments**](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/comments): You can leave comments and replies on cells, which allows for easier team communication.
+
+* [**Notes**](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/notes): Note important information in your worksheet.
+
 ## Supported formats: 
 
 * [**XLSX**](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/formats-and-conversion/xlsx/xlsxformatprovider)