Update rest-client to get security fixes.

rest-client 1.8.0 contains fixes for OSVDB-117461 and
OSVDB-119878.

Gemfile.lock

@@ -108,6 +108,8 @@ GEM
       delayed_job (>= 3.0, < 4.1)
     diff-lcs (1.2.5)
     docile (1.1.5)
+    domain_name (0.5.24)
+      unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
     exception_notification_rails3 (1.2.0)
     execjs (2.2.2)
@@ -122,6 +124,8 @@ GEM
     hashery (2.1.1)
     highline (1.6.21)
     hike (1.2.3)
+    http-cookie (1.0.2)
+      domain_name (~> 0.5)
     i18n (0.7.0)
     journey (1.0.4)
     jquery-rails (3.0.4)
@@ -151,7 +155,7 @@ GEM
     net-ssh (2.9.2)
     net-ssh-gateway (1.2.0)
       net-ssh (>= 2.6.5)
-    netrc (0.10.2)
+    netrc (0.10.3)
     nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
     parallel (1.3.3)
@@ -202,7 +206,8 @@ GEM
     rdoc (3.12.2)
       json (~> 1.4)
     ref (1.0.5)
-    rest-client (1.7.2)
+    rest-client (1.8.0)
+      http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 3.0)
       netrc (~> 0.7)
     roman-numerals (0.3.0)
@@ -280,6 +285,9 @@ GEM
     uglifier (2.7.0)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.7.1)
     webrat (0.7.3)
       nokogiri (>= 1.2.0)
       rack (>= 1.0)