Adds support for git commands on scheme=git

Rewrites blame annotation controller and provider - fixes whitespace issues, reduces overhead, and provides better performance
Rewrites status bar blame support - reduces overhead and provides better performance
Adds showFileHistory command to status bar
Renames showHistory to showFileHistory
Fixes log to use iso 8601 for dates

src/git/gitLocator.ts

@@ -1,3 +1,4 @@
+'use strict';
 import { spawnPromise } from 'spawn-rx';
 import * as path from 'path';