Added initial documentation.

Signed-off-by: armored-dragon <publicmail@armoreddragon.com>

scripts/system/settings/README.md

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+# Settings
+This application allows users to adjust multiple aspects of the Overte application.
+
+## Developing
+
+### QML Widgets
+This application provides several QML widgets to make adding additional settings easy.
+The important settings related widgets are as follows:
+
+| Name                | Description                                                            |
+|---------------------|------------------------------------------------------------------------|
+| SettingBoolean.qml  | An enable/disable toggle for a provided setting                        |
+| SettingComboBox.qml | A drop down element which provides a list of options                   |
+| SettingNumber.qml   | An input which only allows numerical data entry                        |
+| SettingSlider.qml   | An input which only allows numerical data entry, presented as a slider |
+| SettingSlider.qml   | An input which only allows numerical data entry, presented as a slider |
+
+#### Examples
+
+SettingComboBox.qml:
+```qml 
+SettingComboBox {
+	// Provide the label for the setting (String)
+	settingText: "Refresh rate";
+
+	// Options for the setting (Array of strings)
+	options: ["Economical", "Interactive", "Real-Time", "Custom"];
+
+	// Set the index of the combobox based on the current setting (int)
+	optionIndex: Performance.getRefreshRateProfile();
+
+	// When the value is changed, execute...
+	onValueChanged: {						
+		// Adjust the application setting to the current value of the combobox
+		Performance.setRefreshRateProfile(index);
+
+		// If the index is 3 (Custom), show advanced settings, otherwise hide advanced settings.
+		customFPSVaulesContainer.visible = index == 3;
+	}
+}
+```