chore: Significantly restructure folder layout

This moves the various projects from "type-based" folders (such as
"services" or "tools") into more appropriate semantic folders (such as
"nix", "ops" or "web").

Deprecated projects (nixcon-demo & gotest) which only existed for
testing/demonstration purposes have been removed.

(Note: *all* builds are broken with this commit)

web/tazblog/static/blog.css

@@ -0,0 +1,35 @@
+body {
+    margin: 40px auto;
+    max-width: 650px;
+    line-height: 1.6;
+    font-size: 18px;
+    color: #383838;
+    padding: 0 10px
+}
+h1, h2, h3 {
+    line-height: 1.2
+}
+.footer {
+    text-align: right;
+}
+.lod {
+    text-align: center;
+}
+.unstyled-link {
+    color: inherit;
+    text-decoration: none;
+}
+.uncoloured-link {
+    color: inherit;
+}
+.date {
+    text-align: right;
+    font-style: italic;
+    float: right;
+}
+.inline {
+    display: inline;
+}
+.navigation {
+    text-align: center;
+}

web/tazblog/static/keybase.txt

@@ -0,0 +1,69 @@
+==================================================================
+https://keybase.io/tazjin
+--------------------------------------------------------------------
+
+I hereby claim:
+
+  * I am an admin of http://tazj.in
+  * I am tazjin (https://keybase.io/tazjin) on keybase.
+  * I have a public key with fingerprint DCF3 4CFA C1AC 44B8 7E26  3331 36EE 3481 4F6D 294A
+
+To claim this, I am signing this object:
+
+{
+    "body": {
+        "key": {
+            "fingerprint": "dcf34cfac1ac44b87e26333136ee34814f6d294a",
+            "host": "keybase.io",
+            "key_id": "36EE34814F6D294A",
+            "uid": "2268b75a56bb9693d3ef077bc1217900",
+            "username": "tazjin"
+        },
+        "service": {
+            "hostname": "tazj.in",
+            "protocol": "http:"
+        },
+        "type": "web_service_binding",
+        "version": 1
+    },
+    "ctime": 1397644545,
+    "expire_in": 157680000,
+    "prev": "4973fdda56a6cfa726a813411c915458c652be45dd19283f7a4ae4f9c217df14",
+    "seqno": 4,
+    "tag": "signature"
+}
+
+with the aforementioned key, yielding the PGP signature:
+
+-----BEGIN PGP MESSAGE-----
+Version: GnuPG v2.0.22 (GNU/Linux)
+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+=xHfH
+-----END PGP MESSAGE-----
+
+And finally, I am proving ownership of this host by posting or
+appending to this document.
+
+View my publicly-auditable identity here: https://keybase.io/tazjin
+
+==================================================================