Changes from out to dist
Adds size-plugin (commented out for now)
Adds image cache to improve bundle performance

Uses webpack for all of it

Fixes issue with new typescript
Pins node version to match vscode's version (7.9)

Update Welcome content
Updates logo (polish)
Adds scss sorting rules

Updates dependencies

Fixes lint issues

Reorgs tasks
Fixes lint issues

- Status bar blame information will hide
  - CodeLens change to a `Cannot determine...` message and become unclickable
  - Many menu choices and commands will hide
Fixes #36 - Blame information is invalid when a file has unsaved changes
Fixed #38 - Toggle Blame Annotation button shows even when it isn't valid
Preps v2.9.0

Also gracefully deals with the times when git isn't in the PATH

Removes typings (using npm instead)
Fixes some promise catches