Merge pull request #289 from jasnow/master

Upgraded 3 gems [ powder, uglifier, test-unit].

Gemfile.lock

@@ -188,7 +188,7 @@ GEM
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
-    powder (0.3.3)
+    powder (0.4.0)
       thor (>= 0.11.5)
     power_assert (1.1.1)
     powerpack (0.1.1)
@@ -227,8 +227,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rainbow (2.2.2)
-      rake
+    rainbow (3.0.0)
     raindrops (0.19.0)
     rake (12.3.0)
     rb-fsevent (0.10.2)
@@ -259,11 +258,11 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.0)
-    rubocop (0.51.0)
+    rubocop (0.52.0)
       parallel (~> 1.10)
-      parser (>= 2.3.3.1, < 3.0)
+      parser (>= 2.4.0.2, < 3.0)
       powerpack (~> 0.1)
-      rainbow (>= 2.2.2, < 3.0)
+      rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
     rubocop-github (0.6.0)
@@ -296,7 +295,7 @@ GEM
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
     sqlite3 (1.3.13)
-    test-unit (3.2.6)
+    test-unit (3.2.7)
       power_assert
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)
@@ -311,7 +310,7 @@ GEM
     turbolinks-source (5.0.3)
     tzinfo (1.2.4)
       thread_safe (~> 0.1)
-    uglifier (3.2.0)
+    uglifier (4.0.2)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.3.0)
     unicorn (5.3.1)