Causes too much confusion vs -G which better matches user expectations

Adds `${committerAgo}`, `${committerAgoOrDate}`, `${committerDate}`
Repurposes `${authorAgo}` & replaces current ones w/ `${author}, ${ago}`
Repurposes `${authorAgoOrDate}` & replaces w/ `${author}, ${agoOrDate}`
Renames defaultDateType to defaultDateSource
Points format settings to new formatting wiki

Fixes #537

Adds hovers.changesDiff setting for line vs hunk diff

Removes "Branch or Tag" from all commands
Changes openFileRevisionFrom allow entering references
Fixes missing views.compare.selectForCompare from command palette

Adds author email to commit node tooltips
Adds ${email} token to many formats

Tweaks shorten logic to only allow >=5 chars & always append any suffix

Limits stage/unstage to working tree folders
Adds stage/unstage to the folder's inline toolbar
Adds recognition for Tony Brix's contribution

Changes fetch date to  respect date settings

Updates BACKERS

Changes commit search by message to be case-insensitive
Clarifies path/glob for file searches

Updates CHANGELOG

Updates GitLens logo
Adds CodeStream sponsor

Moves Support GitLens up in README
Removes Support GitLens from Settings page

Keeps all path manipulation on the host rather than guest
Fixes shared/local path munging for mac/windows
Keeps current user lookup local when a guest
Keeps difftool lookup local when a guest
Avoids fetch date lookup when a guest
Stops clearing node_modules (for now)