Adds "progress" state to file annotation command

Fixes #118 - stopped working on latest insiders build

Adds stash explorer toggle command

Rename Show File History in Explorer back to Open File History Explorer
Removes the git explorer view (for now)

Adds onDidChangeRepo event to GitService
Refreshes stash view when repo changes

# Conflicts:
#	src/commands/stashApply.ts

Adds templating support to explorer views

Adds refresh commands for explorer views
Adds context menu commands to both explorer views

Fixes newly detected typescript errors

Adds a better description to blame.line.enabled to be clearer about its behavior
Adds a better description to codeLens.enabled to be clearer about its behavior

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