new osx dragndrop installer

CMakeLists.txt

@@ -458,7 +458,7 @@ if (APPLE AND GUI)
 		-DAPP_DMG_EXE=${ETH_APP_DMG}
 		-DAPP_DMG_FILE=appdmg.json.in
 		-DAPP_DMG_ICON="alethzero/alethzero.icns"
-		-DAPP_DMG_BACKGROUND="bg.png"
+		-DAPP_DMG_BACKGROUND="install-folder-bg.png"
 		-DETH_BUILD_DIR="${CMAKE_BINARY_DIR}"
 		-DETH_MIX_APP="$<TARGET_FILE_DIR:mix>"
 		-DETH_ALETHZERO_APP="$<TARGET_FILE_DIR:AlethZero>"

appdmg.json.in

@@ -2,11 +2,11 @@
     "title": "Ethereum",
     "icon": "appdmg_icon.icns",
     "background": "appdmg_background.png",
-    "icon-size": 80,
+    "icon-size": 55,
     "contents": [
-        { "x": 600, "y": 170, "type": "link", "path": "/Applications" },
+        { "x": 242, "y": 240, "type": "link", "path": "/Applications" },
-        { "x": 150, "y": 90,  "type": "file", "path": "${ETH_ALETHZERO_APP}" },
+        { "x": 145, "y": 125,  "type": "file", "path": "${ETH_ALETHZERO_APP}" },
-        { "x": 150, "y": 260, "type": "file", "path": "${ETH_MIX_APP}" }
+        { "x": 339, "y": 125, "type": "file", "path": "${ETH_MIX_APP}" }
     ]
 }