added README

README.md

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+#txt2mongo#
+with txt2mongo you can check the integrity of your lexicon text files as
+used in farhang. You pass the file name or wildcard along to check the
+file entries. If you pass in a database name as a second argument txt2mongo
+will store the entries in your mongodb. If you don't get any output it means
+your files are ok. If you get filenames and line numbers it means you need to
+correct them. Usually a ";" is forgotten.
+To check all files you need to put '*.txt' into quotation marks:
+
+run like this:
+    ruby txt2mongo file.txt|'*.txt' [database]
+example:
+    ruby txt2mongo k.txt test_db
+or:
+    ruby txt2mongo '*.txt'