update README to reflect examples removal.

Author: alsam

README.md

@@ -76,7 +76,7 @@ The original purpose of the package was to simplify translation of Fortran codes
 
   + [ClawPack 5.0](http://clawpack.github.io/index.html)
 
-The directory _examples_ contains at the moment a translation of explicit upwind finite difference scheme for scalar law advection equation from
+The directory _examples_ of [hyperbolic_PDE](https://github.com/alsam/hyperbolic_PDE.jl) contains at the moment a translation of explicit upwind finite difference scheme for scalar law advection equation from
 the book _Numerical Solution of Hyperbolic Partial Differential Equations_ by prof. John A. Trangenstein.
 
 + examples/scalar_law/PROGRAM0/main.jl