avoid unnecessary calls to couch in product list
whitespace
more whitespace
basic implementation of upload products

this leverages/repeats a lot of the location upload workflow, and
needs to be cleaned up a bit
cleanup location importer status view to use soil get_download_context
use soil partial template in location upload
pull out strings to context so the download template can be reused
move download status template to a shared place
missed i18n
extract import status variables to context so they can be shared
move template
add product-specific text to importer job poll view
Merge branch 'master' into product-upload
Merge pull request #2766 from dimagi/product-upload

add product upload view