Simplified API authentication via API key in header (TEST CHANGE)
This is made possible by enforcing HTTPS.
This also moves the loading API to a new and more correct location, from the api version 1 to api version 2 which results in a URL CHANGE and TEST CHANGE
Merge remote-tracking branch 'origin/master' into 686-api-header-authentication
Merge pull request #710 from openspending/686-api-header-authentication

686 api header authentication