website: update Gemfile

website/Gemfile.lock

 GIT
   remote: git://github.com/hashicorp/middleman-hashicorp.git
-  revision: 66e68bbb66eef195542bfb334bf0942df6da2c6e
+  revision: b82c2c2fdc244cd0bd529ff27cfab24e43f07708
   specs:
     middleman-hashicorp (0.1.0)
       bootstrap-sass (~> 3.2)
@@ -11,6 +11,8 @@ GIT
       middleman-minify-html (~> 3.4)
       middleman-syntax (~> 2.0)
       rack-contrib (~> 1.1)
+      rack-rewrite (~> 1.5)
+      rack-ssl-enforcer (~> 0.2)
       redcarpet (~> 3.1)
       therubyracer (~> 0.12)
       thin (~> 1.6)
@@ -29,7 +31,7 @@ GEM
     builder (3.2.2)
     celluloid (0.16.0)
       timers (~> 4.0.0)
-    chunky_png (1.3.2)
+    chunky_png (1.3.3)
     coffee-script (2.3.0)
       coffee-script-source
       execjs
@@ -65,7 +67,7 @@ GEM
     http_parser.rb (0.6.0)
     i18n (0.6.11)
     json (1.8.1)
-    kramdown (1.4.2)
+    kramdown (1.5.0)
     less (2.6.0)
       commonjs (~> 0.2.7)
     libv8 (3.16.14.7)
@@ -124,6 +126,8 @@ GEM
       rack (>= 0.9.1)
     rack-livereload (0.3.15)
       rack
+    rack-rewrite (1.5.0)
+    rack-ssl-enforcer (0.2.8)
     rack-test (0.6.2)
       rack (>= 1.0)
     rb-fsevent (0.9.4)
@@ -157,7 +161,7 @@ GEM
       hitimes
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uber (0.0.9)
+    uber (0.0.10)
     uglifier (2.5.3)
       execjs (>= 0.3.0)
       json (>= 1.8.0)