Merge branch 'what-and-how' into 'master'

_layouts/post.html

css/custom.css

how-to-css/index.md

ideas/index.html

img/how-to/branches.PNG

img/how-to/edit-edit-button.PNG

img/how-to/edit-editing-seen.PNG

img/how-to/edit-find-branch.PNG

img/how-to/fork-success.png

img/how-to/fork.png

img/how-to/mr.PNG

img/how-to/new-branch-success.PNG

img/how-to/new-branch.PNG

img/how-to/new-file.PNG

img/how-to/submit-mr.PNG

index.md

what-is-ccs/index.md