[WP] (i20_gremlin_example): provide bits an pieces for data

The example will be based on synthetic data. Provide refmet config files.

src/green/gremlin1/examples/Makefile

+# this is <Makefile>
+# ----------------------------------------------------------------------------
+# 
+# Copyright (c) 2016 by Thomas Forbriger (BFO Schiltach) 
+# 
+# rules and command to process toy example for gremlin
+# 
+# REVISIONS and CHANGES 
+#    18/06/2016   V1.0   Thomas Forbriger
+# 
+# ============================================================================
 #
-# $Id$
+
+all:
+
+flist: Makefile $(wildcard *.cfg) README COPYING
+	echo $^ | tr ' ' '\n' | sort > $@
+
+.PHONY: edit
+edit: flist; vim $<
+
+.PHONY: clean
+clean: ; 
+	-find . -name \*.bak | xargs --no-run-if-empty /bin/rm -v
+	-/bin/rm -vf flist
+
 #
 # Makefile fuer synthetische Daten Schicht ueber Halbraum
 #
@@ -32,3 +56,5 @@ clean:
 
 2lay.ps: 2laysyg.ps 2lay.fig
 	fig2dev -L eps 2lay.fig $@
+
+# ----- END OF Makefile ----- 

src/green/gremlin1/examples/README

+this is <README>
+============================================================================
+toy example for gremlin
+-----------------------
+
+----- END OF README ----- 

src/green/gremlin1/examples/lin.rcv.cfg

+lineare Auslage
+
+mode, Vred, Tl, Tr, Nr
+2, 0., 0., 0., 20
+
+rmin, rmax, phi
+0.005, 0.100, 0.

src/green/gremlin1/examples/refmet.main.cfg

+Synthetics main
+
+Model taken from
+<MODEL>
+
+Source taken from
+zforce.src
+
+Receivers taken from 
+lin.rcv
+
+umin, uwil, uwir, umax, Nu
+0., 0., 6.5, 8.5, 1000
+
+fmin, fwil, fwir, fmax, dt, T
+0., 0., 130., 130., 0.0010, 3.0