Add search functionality

[David Planella]

Other than browsing the app, it'd be good to be able to find the content the user is looking for via search, similarly to what the settings app does on the phone.

Here there are some instructions to add search to a pelican blog. It seems fairly easy, although the only part I'm not sure about is how to return results in the user's language:

http://mygeekdaddy.net/2014/11/17/adding-local-search-to-pelican/