Modify the main script to process files & dirs

* topy.py (main): The arguments now allow for a directory, if a
  directory is encountered we recursively apply the rules for all non
  binary files and non hidden directories (in *nix like systems)

Fixes intgr#3

topy.py

@@ -136,9 +136,9 @@ def main():
     path = os.path.join(os.path.dirname(__file__), RETF_FILENAME)
     regs = load_rules(path)
 
-    for filename in sys.argv[1:]:
-        apply_to_file(regs, filename)
-
+    for filename in flatten_files(sys.argv[1:]):
+        if not is_binary(filename):
+            apply_to_file(regs,filename)
 
 if __name__ == '__main__':
     main()