Fixes bug 1104123 - Hook up the Share UI to the Bookmarks Provider
Link the ShareTo extension against AlamoFire.
Quick fix for 1104118 - Opening the Share UI takes a few seconds
Update README.md
Update TabsViewController.swift
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Update README.md
Update README.md
Add links to README.
Update for Xcode 6.1.1
using optional chaining instead of forced unwrapping
Update README.md
Bug 1108880 - Implement basic browser UI

Adds a bare bones implementation for a minimal browser app. Includes a
WebView, back/forward buttons, and a navigation text field.
No bug - Bump to latest swift-json subproject.
No bug - Bump BookmarksViewController internal versions.
Bug 1109772 - Part 1: move createMockFavicon to Favicons.
Bug 1109772 - Part 2: rename existing Bookmarks class to BookmarksREST.
Bug 1109772 - Part 3: create 'DataAccess' grouping and Bookmarks.swift.
Bug 1109772 - Part 4: lift out ShareItem to be a top-level struct type.
Bug 1108772 - Part 5: eliminate ShareItem.icon.