Move GeneratUnits.bat to root

For discoverability

Author: angularsen

UnitsNet/Scripts/GenerateUnits.bat renamed to GenerateUnits.bat

@@ -134,7 +134,7 @@ This project is still early and many units and conversions are not yet covered.
 
 Please read the wiki on [Adding a New Unit](https://github.com/anjdreas/UnitsNet/wiki/Adding-a-New-Unit).
 
-Generally adding a unit involves adding or modifying `UnitsNet\Scripts\UnitDefinitions\*.json` files and running `UnitsNet\Scripts\GenerateUnits.bat` to regenerate the source code and test code stubs, then manually implementing the new unit conversion constants in the test code.
+Generally adding a unit involves adding or modifying `UnitsNet\Scripts\UnitDefinitions\*.json` files and running `GenerateUnits.bat` to regenerate the source code and test code stubs, then manually implementing the new unit conversion constants in the test code.
 
   * [Fork the repo](https://help.github.com/articles/fork-a-repo)
   * Do work on branches such as **feature/add-myunit** and **fix/34**