Adopt GOPATH

GOPATH is annoying, but the Go community pushing me to adopt it is even
more annoying.

Gopkg.lock

@@ -1,16 +1,42 @@
-# This was generated by ./generate-vendor.sh
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
 [[projects]]
   branch = "master"
   name = "golang.org/x/crypto"
+  packages = [
+    "blake2s",
+    "chacha20poly1305",
+    "curve25519",
+    "internal/chacha20",
+    "poly1305"
+  ]
   revision = "1a580b3eff7814fc9b40602fd35256c63b50f491"
 
 [[projects]]
   branch = "master"
   name = "golang.org/x/net"
-  revision = "8e0cdda24ed423affc8f35c241e5e9b16180338e"
+  packages = [
+    "bpf",
+    "internal/iana",
+    "internal/socket",
+    "ipv4",
+    "ipv6"
+  ]
+  revision = "9ef9f5bb98a1fdc41f8cf6c250a4404b4085e389"
 
 [[projects]]
   branch = "master"
   name = "golang.org/x/sys"
-  revision = "7f59abf37be6a6007f075af1bc7f16f137bc176b"
+  packages = [
+    "cpu",
+    "unix"
+  ]
+  revision = "88eb85aaee56831ad49eaf7aa80d73de9814cde2"
 
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "d85ae9d2b4afafc3d7535505c46368cbbbec350cf876616302c1bcf44f6ec103"
+  solver-name = "gps-cdcl"
+  solver-version = 1