Ncurses dependency added to the README.md (BehaviorTree#458)

Author: Kucukcollu

README.md

@@ -84,7 +84,7 @@ Please note that **Ubuntu 18.04 is not supported anymore in version 4.X**. Ubunt
 
 First, install the following dependencies (optional, but recommended):
 
-     sudo apt-get install libzmq3-dev libboost-dev
+     sudo apt-get install libzmq3-dev libboost-dev libncurses5-dev libncursesw5-dev
      
 To compile and install the library, from the BehaviorTree.CPP folder, execute: