Add course directory manifest and upload notes

.gitattributes

@@ -1,7 +1,3 @@
-
-# Upload-only course archive
-* filter=lfs diff=lfs merge=lfs -text
-.gitattributes -filter -diff -merge text
-README.md -filter -diff -merge text
-_course_archive/Nautical-Instruments-47/directory-structure.json -filter -diff -merge text
-_course_archive/Nautical-Instruments-47/README.md -filter -diff -merge text
+version https://git-lfs.github.com/spec/v1
+oid sha256:d2d19d33746ee1ae2cc932a71c9c59361a13fef868440cb92441a5e7f2a55922
+size 319

README.md

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99042658648ef8359f9bd264582bdf1dfc69738def6b270f793c10dce358d30b
+size 425

_course_archive/Nautical-Instruments-47/directory-structure.json

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0cdca3d08836f92f78598538a8de7cb1b4d24cf73c54263b6b63e89636ff7c30
+size 5800