Add sqlcmd for Mac and Linux utility, update some info

Author: ktaranov

README.md

@@ -93,7 +93,7 @@ Headers:
  - [udf_SplitStringByDelimiter](/User_Defined_Function/udf_SplitStringByDelimiter.sql)
  - [udf_Tally](/User_Defined_Function/udf_Tally.sql)
  - and many others...
- - [Utilities](/Utilities) (**complete list of 180 SQL Server paid and free Utilities and Tools**)
+ - [Utilities](/Utilities) (**complete list of 197 SQL Server paid and free Utilities and Tools**)
 
 [*Back to top*](#header01)
 
@@ -335,6 +335,7 @@ BIML Bloggers
  - [SQLIndexWorkbook Sample Database](http://www.littlekendra.com/downloads/get-the-sqlindexworkbook-database/) (by Little Kendra)
  - [Data.gov](https://www.data.gov/)
  - [Itzik Ben-Gan Sample Databases](http://tsql.solidq.com/books/source_code/) (by Itzik Ben-Gan)
+ - [Orders: Open Source Sample Database](https://www.brentozar.com/orders-open-source-sample-database/) (by Brent Ozar)
 
 [*Back to top*](#header03)
 
@@ -421,6 +422,7 @@ SQL Server:
  - [Introducing Microsoft SQL Server 2016](https://info.microsoft.com/Introducing-SQL-Server-2016-eBook.html)
  - [Giving away millions of free Microsoft Ebooks](https://blogs.msdn.microsoft.com/mssmallbiz/2016/07/10/free-thats-right-im-giving-away-millions-of-free-microsoft-ebooks-again-including-windows-10-office-365-office-2016-power-bi-azure-windows-8-1-office-2013-sharepoint-2016-sha/) (by Eric Ligman)
  - [Free Phil Factor eBook: Confessions of an IT Manager](https://www.simple-talk.com/opinion/opinion-pieces/free-phil-factor-ebook-confessions-of-an-it-manager/) (by Phil Factor)
+ - [Power BI from Rookie to Rock Star book](http://radacad.com/download-free-power-bi-book-pdf-format) (by Reza Rad)
 
 R:
  - [FreeComputerBooks R EBooks](http://freecomputerbooks.com/langRBooks.html)