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.

acer/c720/README.wiki

@@ -0,0 +1,23 @@
+= Overview =
+* Processor: Intel Celeron 2955U @ 1.40GHz
+* Network controller: Qualcomm Atheros AR9462
+
+= Configuration =
+The C720 comes with a Cypress APA touchpad. Support for this touchpad was added in kernel 3.17-rc1.
+In order to get the touchpad working CONFIG_CHROME_PLATFORMS needs to be enabled.
+
+For example, for touchpad support with the 3.18 kernel, the following should be added to /etc/nixos/configuration.nix:
+
+  boot.kernelPackages = pkgs.linuxPackages_3_18;
+  nixpkgs.config.packageOverrides = pkgs:
+    { linux_3_18 = pkgs.linux_3_18.override {
+        extraConfig =
+          '''''''
+            CHROME_PLATFORMS y
+          ''''''';
+      };
+    };
+
+[[Category:Installation]]
+[[Category:Hardware]]
+[[Category:Laptops]]