Added extra warning

patches/gromacs-5.1.2.config

@@ -7,7 +7,6 @@ function plumed_preliminary_test(){
 
 function plumed_patch_info(){
 cat << EOF
-
 PLUMED can be incorporated into gromacs using the standard patching procedure.
 Patching must be done in the gromacs root directory  _before_ the cmake command is invoked.
 
@@ -19,6 +18,30 @@ gmx mdrun -plumed plumed.dat
 
 For more information on gromacs you should visit http://www.gromacs.org
 
+This is an experimental patch to perform Hamiltonian replica exchange with GROMACS
+Implementation described in:
+  Bussi, Hamiltonian replica-exchange in GROMACS: a flexible implementation,
+  Mol. Phys., DOI: 10.1080/00268976.2013.824126 (2013)
+
+To use it:
+* Prepare separate topologies (topol0.tpr, topol1.tpr, etc)
+* Run a normal replica exchange with gromacs adding the flag "-hrex" on the command line
+
+Suggested checks:
+* Try with several identical force fields and different seed/starting point
+  Acceptance should be 1.0
+
+Warnings:
+* Topologies should have the same number of atoms, same masses and same constraint topology
+* Choose neighbor list update that divides replex
+
+EXTRA WARNING: THIS PATCH FOR GMX 5.1.2 IS STILL UNDER DEVELOPMENT
+  
+
 EOF
 }
 
+plumed_before_patch(){
+  plumed_patch_info
+}
+