Added the Lastfm Events Near spice

Hi.

https://duckduckhack.uservoice.com/forums/5168-ideas-for-duckduckgo-instant-answer-plugins/suggestions/3777627-show-concerts-music-shows-near-me

This is the first pull request for this plugin. Right now it works with the current location of the user using the Location API.
I haven't implemented the case that will allow the user to also type the specific location where to look for shows.