MOD: updated the readme with usage info

README

@@ -13,5 +13,22 @@ pycrypto==2.6.1
 
 
 [[ Usage ]]
+Create PicSeal images
+  picseal.py  -i <image_file>
 
+***** ***** ***** *****
+
+usage: picseal.py [-h] [-f FILE] [-v] [-vv] [-l] [-pm] [-pi] [-pa] [-w]
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -f FILE, --file FILE  source image file
+  -v, --verbose         will set logging level to INFO
+  -vv, --vverbose       will set logging level to DEBUG
+  -l, --logging         will supercede the -v option and send all logging to a
+                        file, logging.DEBUG
+  -pm, --printmeta      print the metadata markers
+  -pi, --printimage     print the image markers
+  -pa, --printall       print all markers
+  -w, --write           write picseal files