Treat :user in profile.clj as project map when outside of project. Fixes #931.

By treating the `:user` profile in `profile.clj` as the project map when one's
outside of a project, the default repositories among with any mentioned
repositories within the `:user` profile will be fetched without any issues. Also
works fine when `profile.clj` doesn't contain any `:user` profile or no
`profile.clj` exists.

leiningen-core/src/leiningen/core/main.clj

@@ -229,7 +229,8 @@ Get the latest verison of Leiningen at http://leiningen.org or by executing
       (when-not project
         ;; We don't use merge-profiles because we don't want to apply middleware
         ;; since middleware won't be ready until plugins are loaded.
-        (let [dummy (project/init-profiles project/defaults [:base :user])]
+        (let [dummy (-> (project/make (:user (user/profiles)))
+                        (project/init-profiles [:base :user]))]
           (project/load-certificates dummy)
           (project/load-plugins dummy)))
       (warn-chaining task-name args)

leiningen-core/src/leiningen/core/project.clj

@@ -389,7 +389,7 @@
      (when (seq (get project key))
        (ensure-dynamic-classloader)
        (classpath/resolve-dependencies
-        key (merge {:repositories default-repositories} project)
+        key project
         :add-classpath? true))
      (doseq [wagon-file (-> (.getContextClassLoader (Thread/currentThread))
                             (.getResources "leiningen/wagons.clj")