Add README

README

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+Django One-Time Login URL
+=========================
+
+This is a simple application for Django that allows an anonymous visitor to log
+in as a user by only visiting a URL. 
+
+By default, the URL is only valid once and cannot be used multiple times. Other
+schemes that involve the number of visit and/or an expiry date can also be
+created. For example, it is possible to create a log in URL that only valid for
+5 visits before next week using this application.
+
+See the file "INSTALL" for installation instruction.
+