taskjuggler: add 3.5.0, keep 2.4.3

Version 3.5.0 was present but was removed in 8085f08.  Keeping the old version
per discussion at https://github.com/NixOS/nixpkgs/pull/845.

pkgs/applications/misc/taskjuggler/3.x/Gemfile

@@ -0,0 +1,2 @@
+source 'http://rubygems.org'
+gem 'taskjuggler'

pkgs/applications/misc/taskjuggler/3.x/Gemfile.lock

@@ -0,0 +1,21 @@
+GEM
+  remote: http://rubygems.org/
+  specs:
+    mail (2.6.3)
+      mime-types (>= 1.16, < 3)
+    mime-types (2.6.1)
+    taskjuggler (3.5.0)
+      mail (>= 2.4.3)
+      term-ansicolor (>= 1.0.7)
+    term-ansicolor (1.3.2)
+      tins (~> 1.0)
+    tins (1.6.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  taskjuggler
+
+BUNDLED WITH
+   1.10.5

pkgs/applications/misc/taskjuggler/3.x/default.nix

@@ -0,0 +1,17 @@
+{ lib, bundlerEnv, ruby }:
+
+bundlerEnv {
+  name = "taskjuggler-3.5.0";
+
+  inherit ruby;
+  gemfile = ./Gemfile;
+  lockfile = ./Gemfile.lock;
+  gemset = ./gemset.nix;
+
+  meta = {
+    description = "A modern and powerful project management tool";
+    homepage    = http://taskjuggler.org/;
+    license     = lib.licenses.gpl2;
+    platforms   = lib.platforms.unix;
+  };
+}

pkgs/applications/misc/taskjuggler/3.x/gemset.nix

@@ -0,0 +1,47 @@
+{
+  "mail" = {
+    version = "2.6.3";
+    source = {
+      type = "gem";
+      sha256 = "1nbg60h3cpnys45h7zydxwrl200p7ksvmrbxnwwbpaaf9vnf3znp";
+    };
+    dependencies = [
+      "mime-types"
+    ];
+  };
+  "mime-types" = {
+    version = "2.6.1";
+    source = {
+      type = "gem";
+      sha256 = "1vnrvf245ijfyxzjbj9dr6i1hkjbyrh4yj88865wv9bs75axc5jv";
+    };
+  };
+  "taskjuggler" = {
+    version = "3.5.0";
+    source = {
+      type = "gem";
+      sha256 = "0r84rlc7a6w7p9nc9mgycbs5h0hq0kzscjq7zj3296xyf0afiwj2";
+    };
+    dependencies = [
+      "mail"
+      "term-ansicolor"
+    ];
+  };
+  "term-ansicolor" = {
+    version = "1.3.2";
+    source = {
+      type = "gem";
+      sha256 = "0ydbbyjmk5p7fsi55ffnkq79jnfqx65c3nj8d9rpgl6sw85ahyys";
+    };
+    dependencies = [
+      "tins"
+    ];
+  };
+  "tins" = {
+    version = "1.6.0";
+    source = {
+      type = "gem";
+      sha256 = "02qarvy17nbwvslfgqam8y6y7479cwmb1a6di9z18hzka4cf90hz";
+    };
+  };
+}

pkgs/top-level/all-packages.nix

@@ -14957,7 +14957,11 @@ in
   teamspeak_client = qt55.callPackage ../applications/networking/instant-messengers/teamspeak/client.nix { };
   teamspeak_server = callPackage ../applications/networking/instant-messengers/teamspeak/server.nix { };
 
-  taskjuggler = callPackage ../applications/misc/taskjuggler { };
+  taskjuggler-2 = callPackage ../applications/misc/taskjuggler/2.x { };
+
+  taskjuggler = callPackage ../applications/misc/taskjuggler/3.x {
+    ruby = ruby_2_0;
+  };
 
   tasknc = callPackage ../applications/misc/tasknc { };