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/Microcomputer-Principles-4/directory-structure.json -filter -diff -merge text
-_course_archive/Microcomputer-Principles-4/README.md -filter -diff -merge text
+version https://git-lfs.github.com/spec/v1
+oid sha256:7ce02984e08f58e7af2114c7d96950597f5a7357919faf27bab9594490d0665d
+size 325

README.md

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ec9764b1a1dfdbc19e5b480afec2587d582d64f88367a7a522bafa29f6caf102
+size 429

_course_archive/Microcomputer-Principles-4/directory-structure.json

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:002c3ca03ceaa4f038a7c76fbe33f7b14e29f74fadd56c2d501922746e7acf0d
+size 7990