Refactors git models & parsers

Adds full git status parsing
Adds git status info into status quick pick
Switches to async/await in file blame/log

src/git/models/status.ts

@@ -0,0 +1,45 @@
+'use strict';
+
+export interface IGitStatus {
+
+    branch: string;
+    repoPath: string;
+    sha: string;
+    state: {
+        ahead: number;
+        behind: number;
+    };
+    upstream?: string;
+
+    files: GitStatusFile[];
+}
+
+export declare type GitStatusFileStatus = '!' | '?' | 'A' | 'C' | 'D' | 'M' | 'R' | 'U';
+
+export class GitStatusFile {
+
+    originalFileName?: string;
+
+    constructor(public repoPath: string, public status: GitStatusFileStatus, public staged: boolean, public fileName: string, originalFileName?: string) {
+        this.originalFileName = originalFileName;
+    }
+
+    getIcon() {
+        return getGitStatusIcon(this.status);
+    }
+}
+
+const statusOcticonsMap = {
+    '!': '$(diff-ignored)',
+    '?': '$(diff-added)',
+    A: '$(diff-added)',
+    C: '$(diff-added)',
+    D: '$(diff-removed)',
+    M: '$(diff-modified)',
+    R: '$(diff-renamed)',
+    U: '$(question)'
+};
+
+export function getGitStatusIcon(status: GitStatusFileStatus, missing: string = '\u00a0\u00a0\u00a0\u00a0'): string {
+    return statusOcticonsMap[status] || missing;
+}