Adds VS App Center analytics + crash reporting

Currently tracks install, refresh, and update app events.

Podfile.lock

@@ -10,6 +10,14 @@ PODS:
   - AltSign/minizip (0.1)
   - AltSign/OpenSSL (0.1)
   - AltSign/plist (0.1)
+  - AppCenter (3.1.0):
+    - AppCenter/Analytics (= 3.1.0)
+    - AppCenter/Crashes (= 3.1.0)
+  - AppCenter/Analytics (3.1.0):
+    - AppCenter/Core
+  - AppCenter/Core (3.1.0)
+  - AppCenter/Crashes (3.1.0):
+    - AppCenter/Core
   - KeychainAccess (3.2.0)
   - Nuke (7.6.3)
   - Roxas (0.1)
@@ -18,6 +26,7 @@ PODS:
 
 DEPENDENCIES:
   - AltSign (from `Dependencies/AltSign`)
+  - AppCenter (~> 3.1.0)
   - KeychainAccess (~> 3.2.0)
   - Nuke (~> 7.0)
   - Roxas (from `Dependencies/Roxas`)
@@ -26,6 +35,7 @@ DEPENDENCIES:
 
 SPEC REPOS:
   trunk:
+    - AppCenter
     - KeychainAccess
     - Nuke
     - Sparkle
@@ -45,12 +55,13 @@ CHECKOUT OPTIONS:
 
 SPEC CHECKSUMS:
   AltSign: c3693fa5a4b6d0ec6bedb74a5d768fe58bd67b87
+  AppCenter: a1c30c47b7882a04a615ffa5ab26c007326436d8
   KeychainAccess: 3b1bf8a77eb4c6ea1ce9404c292e48f948954c6b
   Nuke: 44130e95e09463f8773ae4b96b90de1eba6b3350
   Roxas: 1990039f843f5dc284918dc82375feb80020ef62
   Sparkle: 3f75576db8b0265adef36c43249d747f22d0b708
   STPrivilegedTask: 56c3397238a1ec07720fb877a044898373cd2c68
 
-PODFILE CHECKSUM: 1503b17048964bd0586d5470e6ee1e57917934de
+PODFILE CHECKSUM: 1317f1da77af3fbb8c90b0d34845d2f0068d488c
 
 COCOAPODS: 1.8.4