Hardcode Cloudmade API key.

Ugh, I know. But it's not any less secure than having it out there in
our Javascript, and it turns out Heroku just downright *refuses* to read
it from an environment variable during asset compilation. I even tried
an experimental Heroku addon
(https://devcenter.heroku.com/articles/labs-user-env-compile) but it
didn't work, so for now let's just do this and get it out there. I'm
sick of messing with it.
Set Leaflet icon path explicitly.

When we tried to deploy maps on staging, we got the following error
message in our Javascript console:

Error: Couldn't autodetect L.Icon.Default.imagePath, set it manually.

... so we did. The end.
Merge branch 'places3' of github.com:Skud/growstuff into places3

Conflicts:
	app/assets/javascripts/places.js.erb
Merge pull request #309 from Skud/places3

Places - one more try!