Tweak the downloads configuration file

- Renamed "ubuntu-desktop" to "desktop"
- Renamed "ubuntu-server" to "server"
- Prefer LTS for "server"
- Prefer "amd64" anywhere except for "lubuntu" and "xubuntu"

uitwww/download.json

@@ -16,10 +16,10 @@
         }
     },
     "distros": {
-        "ubuntu-desktop": {
+        "desktop": {
             "pretty-name": "Ubuntu",
             "releases": ["latest", "lts"],
-            "archs": ["i386", "amd64"],
+            "archs": ["amd64", "i386"],
             "download_http": [
                 "{mirror:ubuntu}/{codename}/ubuntu-{version}-desktop-{arch}.iso"
             ],
@@ -27,10 +27,10 @@
                 "{mirror:ubuntu}/{codename}/ubuntu-{version}-desktop-{arch}.iso.torrent"
             ]
         },
-        "ubuntu-server": {
+        "server": {
             "pretty-name": "Ubuntu Server",
-            "releases": ["latest", "lts"],
-            "archs": ["i386", "amd64"],
+            "releases": ["lts", "latest"],
+            "archs": ["amd64", "i386"],
             "download_http": [
                 "{mirror:ubuntu}/{codename}/ubuntu-{version}-server-{arch}.iso"
             ],
@@ -41,7 +41,7 @@
         "kubuntu": {
             "pretty-name": "Kubuntu",
             "releases": ["latest", "lts"],
-            "archs": ["i386", "amd64"],
+            "archs": ["amd64", "i386"],
             "download_http": [
                 "http://cdimage.ubuntu.com/{distro}/releases/{codename}/release/{distro}-{version}-desktop-{arch}.iso"
             ],
@@ -74,7 +74,7 @@
         "ubuntu-gnome": {
             "pretty-name": "Ubuntu GNOME",
             "releases": ["latest", "lts"],
-            "archs": ["i386", "amd64"],
+            "archs": ["amd64", "i386"],
             "download_http": [
                 "http://cdimage.ubuntu.com/{distro}/releases/{codename}/release/{distro}-{version}-desktop-{arch}.iso"
             ],
@@ -85,7 +85,7 @@
         "ubuntu-mate": {
             "pretty-name": "Ubuntu MATE",
             "releases": ["latest", "lts"],
-            "archs": ["i386", "amd64"],
+            "archs": ["amd64", "i386"],
             "download_http": [
                 "http://cdimage.ubuntu.com/{distro}/releases/{codename}/release/{distro}-{version}-desktop-{arch}.iso"
             ],
@@ -96,7 +96,7 @@
         "ubuntustudio": {
             "pretty-name": "Ubuntu Studio",
             "releases": ["lts"],
-            "archs": ["i386", "amd64"],
+            "archs": ["amd64", "i386"],
             "download_http": [
                 "http://cdimage.ubuntu.com/{distro}/releases/{codename}/release/{distro}-{version}-dvd-{arch}.iso"
             ],