Merge branch 'develop', state 2018-10-17

Thanks [User:Summer ... hier!](https://de.wikipedia.org/wiki/Benutzer:Summer_..._hier!)

gnuplot_scripts/Euro_exchange_rate_to_TRY_-_Turkish_Currency_and_Debt_Crisis_2018.plt

@@ -38,6 +38,13 @@ set grid linestyle 1, linestyle 2 # Setzen des linestyle für Major u. Minor
 set xdata time
 set x2data time
 set format x  '1. %b'
+set xtics ('') # leeren Str setzen damit per for-Schleife
+               # addiert werden kann
+do for [month_tic=1:12] {
+  new_xtic = gprintf("2018-%02.0f-01", month_tic)
+  # print 'Setze xtic bei: ' . new_xtic # Ausgabe für Tests
+  set xtics add ( new_xtic )
+}
 if (GPVAL_VERSION >= 5.0) {
   set xtics rotate by +15 center offset 0,-0.5
 } else {

gnuplot_scripts/Euro_exchange_rate_to_TRY_6000px_wide.plt

@@ -39,7 +39,7 @@ set xdata time
 set format x '%Y'
 set xrange ['1998-12-31':'2018-11-01'] 
 set xrange ['1998-12-31':STATS_max + 60*60*24*21] # 21 Tage 'Luft'
-set xtics '01.01.1950', 60 * 60 * 24 * 365.25 * 1
+set xtics '1950-01-01', 60 * 60 * 24 * 365.25 * 1
 set xtics nomirror 
 set mxtics 12
 #set xlabel 'Date'

gnuplot_scripts/Euro_exchange_rate_to_TRY_800px_wide.plt

@@ -38,7 +38,7 @@ set grid  linestyle 1, linestyle 2 # Setzen des linestyle für Major u. Minor
 set xdata time
 set format x '%Y'
 set xrange ['1998-12-31':STATS_max + 60*60*24*150] # 150 Tage 'Luft'
-set xtics '01.01.1950', 60 * 60 * 24 * 365.25 * 5
+set xtics '1950-01-01', 60 * 60 * 24 * 365.25 * 5
 set xtics nomirror 
 set mxtics 5
 # set xlabel 'Date'
@@ -46,7 +46,7 @@ set mxtics 5
 
 unset  ylabel
   set y2label 'TRY'
-unset format y
+#unset format y
   set format y2  '%.0f'
 unset  ytics
   set y2tics 1

gnuplot_scripts/TRY_exchange_rate_to_EUR_-_Turkish_Currency_and_Debt_Crisis_2018.plt

@@ -38,6 +38,13 @@ set grid linestyle 1, linestyle 2 # Setzen des linestyle für Major u. Minor
 set xdata time
 set x2data time
 set format x  '1. %b'
+set xtics ('') # leeren Str setzen damit per for-Schleife
+               # addiert werden kann
+do for [month_tic=1:12] {
+  new_xtic = gprintf("2018-%02.0f-01", month_tic)
+  # print 'Setze xtic bei: ' . new_xtic # Ausgabe für Tests
+  set xtics add ( new_xtic )
+}
 if (GPVAL_VERSION >= 5.0) {
   set xtics rotate by +15 center offset 0,-0.5
 } else {