Drop trailling comma

No need for it.
Merge pull request #12063 from ZDroid/tc

Drop trailling comma
Refer to popovers instead of tooltips.
Merge pull request #12080 from Quy/master

Refer to popovers instead of tooltips.
Update source code download structure
Merge pull request #12081 from Quy/master

Update source code download structure
de-emphasize /docs/assets and docs HTML now that they're outside of the root dir
flip order so sentence reads better
Replace lingering page.url instance with site.baseurl

Refs #12083 & #12037
Quote Node 0.10 so correct version is printed
Use relative URLs
Fix anchor links
Merge pull request #12090 from nschonni/patch-2

Quote Node 0.10 so correct version is printed
Merge pull request #12092 from Quy/master

Use relative URLs and fix anchor links
Fix typo
Merge pull request #12095 from Quy/master

Fix typo
Replace @screen-sm with @screen-sm-min
Reorganize vars
Merge pull request #12097 from ZDroid/deprecated

Replace @screen-sm with @screen-sm-min
Merge pull request #12098 from ZDroid/reorg

Group repo vars together in Jekyll config