[AltStore] Adds redesigned BrowseViewController to browse and install apps

AltStore/Extensions/UIColor+AltStore.swift

@@ -11,4 +11,5 @@ import UIKit
 extension UIColor
 {
     static let altPurple = UIColor(named: "Purple")!
+    static let altGreen = UIColor(named: "Green")!
 }

AltStore/Extensions/UIColor+Hex.swift

@@ -0,0 +1,32 @@
+//
+//  UIColor+Hex.swift
+//  AltStore
+//
+//  Created by Riley Testut on 7/15/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+extension UIColor
+{
+    // Borrowed from https://stackoverflow.com/a/33397427
+    convenience init?(hexString: String)
+    {
+        let hex = hexString.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
+        var int = UInt32()
+        Scanner(string: hex).scanHexInt32(&int)
+        let a, r, g, b: UInt32
+        switch hex.count {
+        case 3: // RGB (12-bit)
+            (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
+        case 6: // RGB (24-bit)
+            (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
+        case 8: // ARGB (32-bit)
+            (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
+        default:
+            return nil
+        }
+        self.init(red: CGFloat(r) / 255, green: CGFloat(g) / 255, blue: CGFloat(b) / 255, alpha: CGFloat(a) / 255)
+    }
+}