Add Web-UI option to preview/disable particular sound-samples

[srcshelton]

Is your feature request related to a problem? Please describe.

Some of the hourly speech-samples are somewhat annoying (one of the English 4pm pronouncements especially!)

More generally, it would be helpful to be able to listen (either locally via the user's browser or via playback on a Nabaztag) to each sound-sample included with pynab and optionally disable any the user doesn't favour.

Describe the solution you'd like

Add an additional UI "Sounds" page listing every bundled speech sample in the form of a hyperlink or button which causes the sound to be played when clicked, each sample also accompanied by a check-box which prevents the particular sample from being used if the box isn't ticked.

Describe alternatives you've considered

It's possible to extract the samples and play them separately, but there's no easy way I'm aware of to prevent a given sample from being played without erasing or moving files...