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)

Adds search commits button to view

Updates README (wip)
Updates welcome & settings pages (wip)

Adds codeLens.includeSingleLineSymbols setting

Changes changelog image links to permalinks
Moves all images for docs into a docs folder
Removes unused images

Closes #354 - Adds line history explorer (wip)
Closes #456 - Adds repository status to the repository nodes

Renanes "Compare x with" commands

Removes gitlens.advanced.git setting

Changes rebase & reset terminal commands to apply to all commit nodes

Adds clearing of the user cache on config change
Fixes lint issues and adds some comments