buildGoPackage: deps.json -> deps.nix in NIXON

https://github.com/NixOS/nixpkgs/pull/17254#issuecomment-245295541

* update docs to describe `deps.nix`
* include goDeps in nix-shell GOPATH
* NixOS 16.09 rel notes about replacing goPackages

pkgs/tools/misc/fzf/default.nix

@@ -16,7 +16,7 @@ buildGoPackage rec {
 
   buildInputs = [ ncurses ];
 
-  goDeps = ./deps.json;
+  goDeps = ./deps.nix;
 
   patchPhase = ''
     sed -i -e "s|expand('<sfile>:h:h').'/bin/fzf'|'$bin/bin/fzf'|" plugin/fzf.vim

pkgs/tools/misc/fzf/deps.json

@@ -1,20 +0,0 @@
-[
-  {
-    "goPackagePath": "github.com/junegunn/go-runewidth",
-    "fetch": {
-      "type": "git",
-      "url": "https://github.com/junegunn/go-runewidth",
-      "rev": "63c378b851290989b19ca955468386485f118c65",
-      "sha256": "1z5mhfrpqdssn3603vwd95w69z28igwq96lh7b9rrdcx440i822d"
-    }
-  },
-  {
-    "goPackagePath": "github.com/junegunn/go-shellwords",
-    "fetch": {
-      "type": "git",
-      "url": "https://github.com/junegunn/go-shellwords",
-      "rev": "35d512af75e283aae4ca1fc3d44b159ed66189a4",
-      "sha256": "08la0axabk9hiba9mm4ypp6a116qhvdlxa1jvkxhv3d4zpjsp4n7"
-    }
-  }
-]

pkgs/tools/misc/fzf/deps.nix

@@ -0,0 +1,20 @@
+[
+  {
+    goPackagePath = "github.com/junegunn/go-runewidth";
+    fetch = {
+      type = "git";
+      url = "https://github.com/junegunn/go-runewidth";
+      rev = "63c378b851290989b19ca955468386485f118c65";
+      sha256 = "1z5mhfrpqdssn3603vwd95w69z28igwq96lh7b9rrdcx440i822d";
+    };
+  }
+  {
+    goPackagePath = "github.com/junegunn/go-shellwords";
+    fetch = {
+      type = "git";
+      url = "https://github.com/junegunn/go-shellwords";
+      rev = "35d512af75e283aae4ca1fc3d44b159ed66189a4";
+      sha256 = "08la0axabk9hiba9mm4ypp6a116qhvdlxa1jvkxhv3d4zpjsp4n7";
+    };
+  }
+]