contrib: Updated offline repo packeges

disabled singular
updated vanilla kernel urls

contrib/rootfs/offline_repo.json

@@ -92,12 +92,21 @@
             "tagged": true
         },
         {
-            "pkgname": "linux-image-4.3.0-040300-rc2-generic_4.3.0",
+            "pkgname": "linux-image-4.3.0-040300rc5-generic_4.3.0",
             "pkgdescription": "Vanilla Linux Kernel",
             "tagged": false,
             "urls": [
-              "http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc2-unstable/linux-image-4.3.0-040300rc2-generic_4.3.0-040300rc2.201509201830_amd64.deb",
-              "http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc2-unstable/linux-image-4.3.0-040300rc2-generic_4.3.0-040300rc2.201509201830_i386.deb"
+              "http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc5-unstable/linux-image-4.3.0-040300rc5-generic_4.3.0-040300rc5.201510111530_amd64.deb",
+              "http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc5-unstable/linux-image-4.3.0-040300rc5-generic_4.3.0-040300rc5.201510111530_i386.deb"
+            ]
+        },
+        {
+            "pkgname": "linux-headers-4.3.0-040300rc5-generic_4.3.0",
+            "pkgdescription": "Vanilla Linux Kernel Headers",
+            "tagged": false,
+            "urls": [
+              "http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc5-unstable/linux-headers-4.3.0-040300rc5-generic_4.3.0-040300rc5.201510111530_amd64.deb",
+              "http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc5-unstable/linux-headers-4.3.0-040300rc5-generic_4.3.0-040300rc5.201510111530_i386.deb"
             ]
         }
       ]
@@ -108,6 +117,7 @@
             "pkgname": "singular",
             "pkgdescription": "Tool für die Vorlesung Computeralgebra",
             "tagged": true,
+            "hidden": true,
             "urls": [
               "ftp://ftp.halifax.rwth-aachen.de/debian/pool/main/s/singular/singular_4.0.2+ds-1+b1_amd64.deb",
               "ftp://ftp.halifax.rwth-aachen.de/debian/pool/main/s/singular/singular_4.0.2+ds-1+b1_i386.deb",