Added some READMEs with basic docs.

README.md

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+## jQuery UI Extensions ##
+
+See the README in each folder for documentation.
+
+### Installation ###
+
+Select the extension you want to use, take the script and put it in your app's javascript dir and refer to it *after* the jQuery standard libs.
+
+### Will these clobber existing jQuery UI stuff? ###
+
+No, they work alongside.
+
+### Which versions of jQuery will this work with? ###
+
+Presumably 1.8+, but to be honest, I don't do any testing beyond the day that I write the individual extensions. At some point I will have time to actually write tests and documentation and add more extensions.
+
+
+### Contributing ###
+
+Feel free to send PRs to add descriptions to the demos.

autocomplete/README.md

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+## jQuery UI Autocomplete Extensions ##
+
+These are extensions to the [jQuery UI Autocomplete](http://docs.jquery.com/UI/Autocomplete) widget.
+
+### Accent Folding ###
+
+See [accentFolding.html](autocomplete/accentFolding.html)
+
+Enable accent folding in your search terms. This makes it possible to search for values that contain accents without requiring the user to type the accented characters. For example, a user could search for "Jörn" by simply typing "Jorn".
+
+
+#### API ####
+
+This extension does not expose any API. Accent folding is automatically enabled for all autocomplete fields.
+
+
+### Auto Select ###
+
+See [autoSelect.html](autocomplete/autoSelect.html)
+
+Automatically select an item if the user types a valid value and leaves the text field without explicitly selecting the item from the menu.
+
+
+#### API ####
+
+This extension does not expose any API. Values are automatically selected for all autocomplete fields if there is a perfect match in the results.
+
+
+### HTML labels ###
+
+See [html.html](autocomplete/html.html)
+
+Allow HTML to be displayed for each item's label.
+
+#### API ####
+
+This extension adds a boolean `html` option. When set to true, the label will be interpreted as HTML. When set to false, the label will be interpreted as text
+
+
+### Select First Item ###
+
+See [selectFirst.html](autocomplete/selectFirst.html)
+
+Automatically place focus on the first item in the menu. This reduces the number of keystrokes necessary to choose an item.
+
+#### API ####
+
+This extension adds a boolean `selectFirst` option. When set to true, the first item in the menu will automatically be focused when the menu is shown.

dialog/README.md

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+## jQuery UI Dialog Extensions ##
+
+These are extensions to the [jQuery UI Dialog](http://docs.jquery.com/UI/Dialog) widget.
+
+##Auto Reposition
+
+See [autoReposition.html](dialog/autoReposition.html)
+
+Automatically reposition dialogs when the window is resized.
+
+### API ###
+
+This extension does not expose any API. All open dialogs are automatically repositioned when the window is resized.