Update README.md

README.md

 # log_in
 A simple gui to record IDs as typed or from a card reader with the time.
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+This program uses PySimpleGui to open a window that will record IDs entered into an input element.
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+It will output a message confirming the time that the ID was recorded and it will write the ID and the time to a file for subsequent use.
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+It is very close to the cookbook examples for a persistent window, the main change is to the styling and 
+to add the window.refresh() and small delay to make the feedback more human affirmative. There may be a
+better way of achieving this, there is a small possibility of cards clashing in the 100 milliseconds it pauses.
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+This will get reviewedin case it does prove to be an issue.
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