switch to "gemspec" stanza for Gemfile

Gemfile.lock

@@ -1,19 +1,28 @@
+PATH
+  remote: .
+  specs:
+    foreman (0.12.0)
+      term-ansicolor (~> 1.0.5)
+      thor (>= 0.13.6)
+
 GEM
   remote: http://rubygems.org/
   specs:
+    crack (0.1.8)
     diff-lcs (1.1.2)
     fakefs (0.2.1)
     hpricot (0.8.2)
     json (1.5.1)
     mime-types (1.16)
     mustache (0.11.2)
-    parka (0.3.1)
+    parka (0.6.2)
+      crack
       rest-client
       thor
     rake (0.8.7)
     rcov (0.9.8)
     rdiscount (1.6.5)
-    rest-client (1.6.0)
+    rest-client (1.6.1)
       mime-types (>= 1.16)
     ronn (0.7.3)
       hpricot (>= 0.8.2)
@@ -39,11 +48,10 @@ PLATFORMS
 DEPENDENCIES
   fakefs (~> 0.2.1)
   json (~> 1.5.1)
+  foreman!
   parka
   rake
   rcov (~> 0.9.8)
   ronn
   rr (~> 1.0.2)
   rspec (~> 2.0.0)
-  term-ansicolor (~> 1.0.5)
-  thor (>= 0.13.6)