Added README.

Author: Marty Wallace

README.md

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+# vue-keyboard
+
+A simple virtual keyboard for Vue.js.
+
+## Usage:
+
+Simply add the `keyboard` component to your Vue application:
+
+```
+<keyboard chars="abc123|xyz456|{space:space}"></keyboard>
+```
+
+The `chars` property accepts a pipe `|` delimited string of characters to use as the keyboard buttons. You can include special function characters with the `{text:action}` syntax, where `text` is the text that will be rendered in the button and `action` is the action within the keyboard component to be called when that button is pressed. The actions are:
+
+* `backspace` - Remove one character from the end of the current value.
+* `space` - Insert one whitespace character.
+* `clear` - Clear the entire input value.