Add links to the benchmark input files

gpaw/README.md

@@ -62,7 +62,7 @@ A ground state calculation for a carbon nanotube in vacuum. By default uses a
 option to use ScaLAPACK. Expected to scale up to 10 nodes and/or 100 MPI
 tasks.
 
-Input file: carbon-nanotube/input.py
+Input file: [benchmark/carbon-nanotube/input.py](benchmark/carbon-nanotube/input.py)
 
 #### Case M: Copper filament
 
@@ -70,7 +70,7 @@ A ground state calculation for a copper filament in vacuum. By default uses a
 2x2x3 FCC lattice with 71 atoms (freely adjustable) and ScaLAPACK for
 parallelisation. Expected to scale up to 100 nodes and/or 1000 MPI tasks.
 
-Input file: copper-filament/input.py
+Input file: [benchmark/carbon-nanotube/input.py](benchmark/copper-filament/input.py)
 
 #### Case L: Silicon cluster
 
@@ -79,7 +79,7 @@ cluster has a radius of 15Å (freely adjustable) and consists of 702 atoms,
 and ScaLAPACK is used for parallelisation. Expected to scale up to 1000 nodes
 and/or 10000 MPI tasks.
 
-Input file: silicon-cluster/input.py
+Input file: [benchmark/carbon-nanotube/input.py](benchmark/silicon-cluster/input.py)
 
 
 ### Running the benchmarks