Distribute .map static files (makinacorpus#307)

Author: claudep

MANIFEST.in

@@ -1,7 +1,8 @@
 include README.rst CHANGES LICENSE
 recursive-include leaflet/locale *.mo
 recursive-include leaflet/templates *.html *.js
-recursive-include leaflet/static *.js
 recursive-include leaflet/static *.css
+recursive-include leaflet/static *.js
+recursive-include leaflet/static *.map
 recursive-include leaflet/static *.png
 recursive-include leaflet/static *.svg