(v2) Make raw importer honour multiple files

Resolves issue where raw importer was only honouring last entry for
several files with same upstream path.

These files were being passed as comma-separated URLs under the 'urls'
tag in the .lorry file. The yaml importer could only store one entry per
'urls', updating a dictionary entry after each comma.

The changes in this commit allow for multiple files to be added, but the
URLs must now be added in the form:

```
  urls:
    - destination: libosinfo
      url: https://releases.pagure.org/libosinfo/osinfo-db-20211216.tar.xz
    - destination: libosinfo
      url: https://releases.pagure.org/libosinfo/libosinfo-1.2.0.tar.gz
```
A previous branch was created to resolve this issue, but the solution required URLs to be separted by whitespace. It was decided that the format implemented here is preferable.

Resolves: #29

1 files changed, 10 insertions, 4 deletions

diff --git a/README.md b/README.md
index 199e8da..302b443 100644
--- a/README.md
+++ b/README.md
@@ -297,10 +297,16 @@ repository.
     {
         "raw-file-repo": {
             "type": "raw-file",
-            "urls": {
-                "authorities/england-and-wales": "http://geoportal1-ons.opendata.arcgis.com/datasets/0b09996863af4b5db78058225bac5d1b_0.kml",
-                "radiological-monitoring-data": "https://fsadata.github.io/radiological-monitoring-data/data/provisional-2016-bi-annual-aquatic-and-terrestrial-monitoring-results-26062017-raw-results.csv"
-            }
+            "urls": [
+                {
+                    "url": "http://geoportal1-ons.opendata.arcgis.com/datasets/0b09996863af4b5db78058225bac5d1b_0.kml",
+                    "destination": "authorities/england-and-wales"
+                },
+                {
+                    "url": "https://fsadata.github.io/radiological-monitoring-data/data/provisional-2016-bi-annual-aquatic-and-terrestrial-monitoring-results-26062017-raw-results.csv",
+                    "destination": "radiological-monitoring-data"
+                }
+            ]
         }
     }