Add auto start to Locate Control plugin

Actually, the locate control plugin doesn’t provide a way of auto start, being necessary the user click on plugin button to get the position showed on map. However, the Leaftlet plugin gives the possibility of having an auto-start simply by doing lc.start(); after the plugin is initiated. source

@Conengmo, if you are okay with implementing this on the folium plugin I’m happy in making a PR.

I already implemented and tested here and works as expected.

[mejl]

Hello @fullonic. That worked, thank you.

[fullonic]

Hi @mejl. To use this functionality, you just need to initiate the LocateControl plugin with the auto_start=True instead of the default value False. https://github.com/python-visualization/folium/blob/67aab11039cd990d73fdf14566380286835ff84b/folium/plugins/locate_control.py#L68