treewide: modules -> profiles, separate dirs, list in README (#29)

Enforce proper naming: all paths are lowercase and hyphen-separated,
if there's a line of models (aspire, macbook-pro, thinkpad) it becomes
a subdirectory. Documentation for profiles is moved to README files in
respective directories.

Add an Org mode table that lists all available profiles and their paths.

Instead of fetching repo locally, use a Nix channel. Making hardware
profiles read-only should improve quality and amount of participation
long-term.

lenovo/thinkpad/t460s/default.nix

@@ -0,0 +1,29 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [
+    ../lib/kernel-version.nix
+    ./general-intel.nix
+  ];
+
+  # Use the gummiboot efi boot loader. (From default generated configuration.nix)
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  # https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_T460s
+  kernelAtleast = [
+    { version = "4.5.1"; msg = "The physical mouse buttons works incorrectly."; }
+    { version = "4.6";   msg = "Suspending the T460s by closing the lid when running on battery causes the machine to freeze up entirely."; }
+  ];
+
+  # For the screen. I don't know what to do with this information, but
+  # the hiDPI support is far from perfect (as of July 2016):
+
+  # Resolution: 2560 x 1440 px
+  # Size: 12.2" × 6.86" (30.99cm × 17.43cm)
+  # DPI: 209.8
+  # Dot Pitch: 0.1211mm
+  # Aspect Ratio: 16 × 9 (1.78:1)
+  # Pixel Count: 3,686,400
+  # Megapixels: 3.69MP
+}