Added documentation of -l option to readme.

README.md

@@ -5,6 +5,18 @@ Includes lemmatizer and tagger for language of origin.
 
 _enrich.pl script to be used with lexicon file in each subdirectory (e.g., lexicon.txt in the languagetagger subdirectory for the language-of-origin tagging) 
 
+Usage:  _enrich.pl [optional args] <LEXICON> <IN_FILE>
+
+Options and arguments:
+
+-h              print this [h]elp message and quit
+-l              [l]exicon file (required). Defaults to lexicon.txt in same directory.
+
+<IN_FILE>    A text file one category per line, only text up to the first tab is used for lexicon lookup
+
+example: _enrich.pl -l language-tagger/lexicon.txt my_file.txt
+
+
 Lemmatizer still under development, not ready for release.
 
 Copyright 2013-14 Amir Zeldes, Caroline T. Schroeder.  The perl program is free software. You may copy or redistribute the script under the same terms as Perl itself.