Update and rename README.txt to README.md

README.md

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+FileLock
+========
+
+A file locking mechanism that has context-manager support so 
+you can use it in a with statement. This should be relatively cross
+compatible as it doesn't rely on msvcrt or fcntl for the locking.
+
+Usage
+=====
+
+```python
+from filelock import FileLock
+
+with FileLock("myfile.txt"):
+    # work with the file as it is now locked
+    print("Lock acquired.")
+```
+
+
+Originally posted at http://www.evanfosmark.com/2009/01/cross-platform-file-locking-support-in-python/