If a provider's endpoint contains a '?' join parameters using an ampersand - fixes #18
If a provider's endpoint contains a '?' join parameters using an
ampersand - fixes #18

akvo/djangoembed,worldcompany/djangoembed,akvo/djangoembed,d4nielcosta/djangoembed,d4nielcosta/djangoembed,worldcompany/djangoembed,0101/djangoembed,0101/djangoembed