Update students/modules/OpNotes/assets/images/.gitkeep,...

Update students/modules/OpNotes/assets/images/.gitkeep, students/modules/OpNotes/assets/images/cht.sh-01.png, students/modules/OpNotes/assets/images/git_01.png, students/modules/OpNotes/assets/images/git_02.png, students/modules/OpNotes/assets/images/git_03.png, students/modules/OpNotes/assets/images/git_04.png, students/modules/OpNotes/assets/images/git_05.png, students/modules/OpNotes/assets/images/git_06.png, students/modules/OpNotes/assets/images/git_07.png, students/modules/OpNotes/assets/images/git_08.png, students/modules/OpNotes/assets/images/git_09.png, students/modules/OpNotes/assets/images/git_10.png, students/modules/OpNotes/assets/images/git_11.png, students/modules/OpNotes/assets/images/git_12.png, students/modules/OpNotes/assets/images/git_13.png, students/modules/OpNotes/assets/images/git_14.png, students/modules/OpNotes/assets/images/git_15.png, students/modules/OpNotes/assets/images/git_16.png, students/modules/OpNotes/assets/images/git_17.png, students/modules/OpNotes/assets/images/git_workflow.png, students/modules/OpNotes/pages/.gitkeep, students/modules/OpNotes/pages/Google_fu.adoc, students/modules/OpNotes/pages/OS_Day0_SG.adoc, students/modules/OpNotes/pages/cht.adoc, students/modules/OpNotes/pages/git_about.adoc, students/modules/OpNotes/pages/git_workflow_basics-brief.adoc, students/modules/OpNotes/pages/git_workflow_basics_visual_.adoc, students/modules/OpNotes/examples/.gitkeep, students/modules/OpNotes/examples/os_modules_000_opnotes_examples_demo-cht.tty files