Adds comparison results view

Hides working changed files behind insiders flag
Unhides Changed Files node from behind insiders flag
Adds changed file count to Changed Files node label
Adds icon to Changed Files node
Adds upstream branch to upstream status nodes
Sorts files in the Changed Files node

Adds "progress" state to file annotation command

# Conflicts:
#	src/commands/stashApply.ts

Adds templating support to explorer views

Moves annotation messages from formatter to annotations
Moves icons into dark/light folders

Adds all-new, beautiful, highly customizable and themeable, file blame annotations
Adds all-new configurability and themeability to the current line blame annotations
Adds all-new configurability to the status bar blame information
Adds all-new configurability over which commands are added to which menus via the `gitlens.advanced.menus` setting
Adds better configurability over where Git code lens will be shown -- both by default and per language
Adds an all-new `changes` (diff) hover annotation to the current line - provides instant access to the line's previous version
Adds `Toggle Line Blame Annotations` command (`gitlens.toggleLineBlame`) - toggles the current line blame annotations on and off
Adds `Show Line Blame Annotations` command (`gitlens.showLineBlame`) - shows the current line blame annotations
Adds `Toggle File Blame Annotations` command (`gitlens.toggleFileBlame`) - toggles the file blame annotations on and off
Adds `Show File Blame Annotations` command (`gitlens.showFileBlame`) - shows the file blame annotations
Adds `Open File in Remote` command (`gitlens.openFileInRemote`) to the `editor/title` context menu
Adds `Open Repo in Remote` command (`gitlens.openRepoInRemote`) to the `editor/title` context menu
Changes the position of the `Open File in Remote` command (`gitlens.openFileInRemote`) in the context menus - now in the `navigation` group
Changes the `Toggle Git Code Lens` command (`gitlens.toggleCodeLens`) to always toggle the Git code lens on and off
Removes the on-demand `trailing` file blame annotations -- didn't work out and just ended up with a ton of visual noise
Removes `Toggle Blame Annotations` command (`gitlens.toggleBlame`) - replaced by the `Toggle File Blame Annotations` command (`gitlens.toggleFileBlame`)
Removes `Show Blame Annotations` command (`gitlens.showBlame`) - replaced by the `Show File Blame Annotations` command (`gitlens.showFileBlame`)

Adds blame toggle to the editor toolbar

Cleaned up the blame hightlights (wip)