Rename/clarify terminology about leaflet-plugin HOT 1 CLOSED

I changed some of these in v1

• dropPin is changed to markers - for no reason other than to match the terminology Leaflet uses.
• hide_other_controls is removed. The more I think about it, the more I think this isn't the purview of the library to force that particular UX opinion on users, especially since it's a blunt force solution: we don't know exactly what we're hiding, only that other controls (from Leaflet or other libraries) might exist and they should all go away, dammit. I think what we ought to do is recognize that whoever is responsible for integrating the plugin needs to make their own decisions (and write their own code) about what controls are visible and what's not, and when to do it.

Options still using the same terminology:

• full_width is renamed fullWidth to correspond with Leaflet standards on using camelCase names, but the words are still the same
• expanded is unchanged so far

from leaflet-plugin.