Added support for unpng

pnger.py

@@ -10,16 +10,31 @@
 import sys
 import argparse
 
-def pngit(infile, outfile):
 
+
+
+def pngit(infile, outfile, nowrite=0):
+	outcounter = 0
 	with open(outfile, "wb") as theoutf:
-        	theoutf.write("\x89\x50\x4E\x47\x0D\x0A\x1A\x0A")
+		
+		if nowrite == 0:
+        		theoutf.write("\x89\x50\x4E\x47\x0D\x0A\x1A\x0A")
+		
 		with open(infile, "rb") as f:
+		
 			byte = f.read(1)
 			while byte != "":
-				theoutf.write(byte)	
+		
+				if outcounter >= nowrite:
+					theoutf.write(byte)	
+				else:
+					outcounter+=1
+				
 				byte = f.read(1)
 
+def unpngit(infile, outfile):
+	pngit(infile, outfile, 8)
+
 if __name__ == '__main__':
 	parser = argparse.ArgumentParser(description='Process some integers.')
 	parser.add_argument('-i', '--input', help='the input file you want to perform a png or unpng operation on.')