switched to using bundle's own gemspec format

instead of jeweler

Gemfile.lock

@@ -1,16 +1,16 @@
+PATH
+  remote: .
+  specs:
+    time_ext (0.2.7)
+      activesupport (>= 2.3.0)
+      i18n (>= 0.4.2)
+
 GEM
   remote: http://rubygems.org/
   specs:
     activesupport (3.0.3)
     diff-lcs (1.1.2)
-    gemcutter (0.6.1)
-    git (1.2.5)
     i18n (0.4.2)
-    jeweler (1.4.0)
-      gemcutter (>= 0.1.0)
-      git (>= 1.2.5)
-      rubyforge (>= 2.0.0)
-    json_pure (1.4.6)
     rspec (2.1.0)
       rspec-core (~> 2.1.0)
       rspec-expectations (~> 2.1.0)
@@ -19,8 +19,6 @@ GEM
     rspec-expectations (2.1.0)
       diff-lcs (~> 1.1.2)
     rspec-mocks (2.1.0)
-    rubyforge (2.0.4)
-      json_pure (>= 1.1.7)
     yard (0.6.3)
 
 PLATFORMS
@@ -29,6 +27,6 @@ PLATFORMS
 DEPENDENCIES
   activesupport (>= 2.3.0)
   i18n (>= 0.4.2)
-  jeweler (>= 1.4.0)
   rspec (>= 2.1.0)
+  time_ext!
   yard (>= 0.6.3)