options panel; custom map urls (in progress); double-click to place map marker;
propagate subdomain stril to L.TileLayer via options
handle subdomains
handle empty map_type
hide subdomains unless custom url
add help icons and popovers on edit page
fix window resize handler
comment out language controls
shrink popover text; close popovers on generic click
alternate 'sxs' layout option
fix sxs resize handling
remove debug output
Release 0.0.10