Help hinzugefügt

Help.md

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+```
+$ ./gps_csv_to_kml -h
+
+Version: 1.7 (created: 2015-09-14)
+
+BASIC USAGE...
+  (if a CSV-file "gps.log" is present in the same directory):
+    $ ./gps_csv_to_kml
+  OR
+    $ bash gps_csv_to_kml
+    $ ksh gps_csv_to_kml
+    $ zsh gps_csv_to_kml
+    $ dash gps_csv_to_kml
+    $ busybox ash gps_csv_to_kml
+  (then the default output file will be something like
+    "gps_201508291530450200.kml" and the logile
+    something like "kml_201508291530450200.log")
+
+OPTIONS:
+  -h : display usage and exit
+  -i : define custom input file  (default: gps.log)
+  -l : define custom log file
+  -n : disable logging           (enabled by default)
+  -o : define custom output file
+  -q : disable stdout            (enabled by default)
+  -v : print version and exit
+```