Add support for parsing from stdin.

Document stdin & stdout capabilities in README.

README

@@ -81,11 +81,15 @@ configuration (see `--logformat` argument documentation).
 
 Input files may be provided gzip'ed.
 
+Input filename "-" is understood as stdin.
+
 Output
 ------
 
 The output is HTML + CSS + JS, so you need a web browser to read it.
 
+Output filename "-" is understood as stdout.
+
 Usage
 =====
 

apachedex/__init__.py

@@ -974,6 +974,9 @@ def main():
   for fileno, filename in enumerate(infile_list, 1):
     print >> sys.stderr, 'Processing %s [%i/%i]' % (
       filename, fileno, file_count)
+    if filename == '-':
+      logfile = sys.stdin
+    else:
       logfile = gzip.open(filename)
       try:
         logfile.readline()