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/development/tools/leaps/default.nix

@@ -14,7 +14,7 @@ buildGoPackage rec {
     fetchSubmodules = false;  
   };
 
-  goDeps = ./deps.json;
+  goDeps = ./deps.nix;
   meta = {
     description = "A pair programming tool and library written in Golang";
     homepage = "https://github.com/jeffail/leaps/";

pkgs/development/tools/leaps/deps.json

@@ -1,11 +0,0 @@
-[
-  {
-   "goPackagePath": "golang.org/x/net",
-    "fetch": {
-      "type": "git",
-       "url": "https://go.googlesource.com/net",
-       "rev": "07b51741c1d6423d4a6abab1c49940ec09cb1aaf",
-       "sha256": "12lvdj0k2gww4hw5f79qb9yswqpy4i3bgv1likmf3mllgdxfm20w"
-    }
-  }
-]

pkgs/development/tools/leaps/deps.nix

@@ -0,0 +1,11 @@
+[
+  {
+    goPackagePath = "golang.org/x/net";
+    fetch = {
+      type = "git";
+      url = "https://go.googlesource.com/net";
+      rev = "07b51741c1d6423d4a6abab1c49940ec09cb1aaf";
+      sha256 = "12lvdj0k2gww4hw5f79qb9yswqpy4i3bgv1likmf3mllgdxfm20w";
+    };
+  }
+]