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/commands/showFileHistory.ts

@@ -0,0 +1,35 @@
+'use strict';
+import { commands, Position, Range, TextEditor, TextEditorEdit, Uri, window } from 'vscode';
+import { EditorCommand } from './commands';
+import { BuiltInCommands, Commands } from '../constants';
+import GitProvider, { GitUri } from '../gitProvider';
+import { Logger } from '../logger';
+
+export default class ShowFileHistoryCommand extends EditorCommand {
+    constructor(private git: GitProvider) {
+        super(Commands.ShowFileHistory);
+    }
+
+    async execute(editor: TextEditor, edit: TextEditorEdit, uri?: Uri, position?: Position, sha?: string, line?: number) {
+        if (!(uri instanceof Uri)) {
+            if (!editor.document) return undefined;
+            uri = editor.document.uri;
+
+            // If the command is executed manually -- treat it as a click on the root lens (i.e. show blame for the whole file)
+            position = editor.document.validateRange(new Range(0, 0, 0, 1000000)).start;
+        }
+
+        const gitUri = GitUri.fromUri(uri);
+
+        try {
+            const locations = await this.git.getLogLocations(gitUri.fsPath, sha, line);
+            if (!locations) return window.showWarningMessage(`Unable to show history. File is probably not under source control`);
+
+            return commands.executeCommand(BuiltInCommands.ShowReferences, uri, position, locations);
+        }
+        catch (ex) {
+            Logger.error('[GitLens.ShowFileHistoryCommand]', 'getLogLocations', ex);
+            return window.showErrorMessage(`Unable to show history. See output channel for more details`);
+        }
+    }
+}