IMPROVE PFARM link to download

pfarm/README.md

@@ -2,7 +2,9 @@ README file for PRACE Accelerator Benchmark Code PFARM (stage EXDIG, program RMX
 ===================================================================================
 Author: Andrew Sunderland (a.g.sunderland@stfc.ac.uk).
 
-The code download should contain the following directories:
+The [code download](https://www.dropbox.com/sh/dlcpzr934r0wazy/AABlphkgEn9tgRlwHY2k3lqBa?dl=0
+) should contain the following directories:
+
 
 ```
 benchmark/RMX_HOST: RMX source files for running on Host or KNL (using LAPACK or MKL)