Starting to move the test fixtures into their own directory

.gitignore

 node_modules
 .DS_Store
 .idea
+test_data/output/
 test_data/catalog/index.html

test_data/NOTES.md

+TEST FIXTURES
+=============
+
+Structure of the test_data directory
+
+test_data/fixtures/ - all the previous contest of test_data
+test_data/output/
+
+Before running the test, copy test_data/fixtures/GTM (for eg) to test_data/output/GTM
+
+Then run the tests on the second directory, which is gitignored.
\ No newline at end of file