Update README.md

Author: kbat

README.md

@@ -4,7 +4,7 @@ ROOT-based tools for FLUKA, PHITS and MCNP Monte Carlo codes
 Project homepage: https://github.com/kbat/mc-tools
 
 ## FLUKA
-* Emacs [syntax highlighting script](https://github.com/kbat/mc-tools/blob/master/mctools/fluka/fluka-mode.el) for [FLUKA](http://www.fluka.org) input files.
+* Emacs [syntax highlighting script](https://github.com/kbat/mc-tools/blob/master/mctools/fluka/fluka-mode.el) for the [FLUKA](http://www.fluka.org) input files.
 * [fluka2root](https://github.com/kbat/mc-tools/blob/master/mctools/fluka/fluka2root.py) tool to convert the FLUKA binary output into [ROOT](https://root.cern). It first calls the standard FLUKA tools to merge data files and then converts the merged files into a single ROOT file. To understand how to use it, run a standard example
 ~~~
   $FLUPRO/flutil/rfluka $FLUPRO/exmixed.inp
@@ -13,6 +13,8 @@ and then execute ```fluka2root exmixed.inp```. A more detailed tutorial is avail
 * [plotgeom2root](https://github.com/kbat/mc-tools/blob/master/mctools/fluka/plotgeom2root.py) script to convert the [PLOTGEOM](http://www.fluka.org/fluka.php?id=man_onl&sub=63) binary output into a [TMultiGraph](https://root.cern/root/html606/classTMultiGraph.html) object.
 * [sigma](https://github.com/kbat/mc-tools/blob/master/mctools/fluka/sigma.py) script to plot integral FLUKA cross sections as functions of incident energy.
 
+Attention to the [FLUKA.CERN](https://fluka.cern) users: these tools are primarily designed for the [authentic FLUKA](http://www.fluka.org), with some effort made to support your fork as well. Any assistance in improving this compatibility is greately appreciated. See the [Contacts](https://github.com/kbat/mc-tools/edit/master/README.md#contacts) section below.
+
 ## MСNР
 * Emacs [syntax highlighting script](https://github.com/kbat/mc-tools/blob/master/mctools/mcnp/mcnpgen-mode.el) for [MCNP](https://mcnp.lanl.gov) input files.
 * An implementation of application programming interface (API) to