Update gem dependencies

Gemfile.lock

@@ -8,16 +8,16 @@ GEM
       thread_safe (~> 0.1)
       tzinfo (~> 0.3.37)
     atomic (1.1.14)
-    backports (3.4.0)
+    backports (3.5.0)
     better_errors (1.1.0)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
-    browser (0.3.2)
+    browser (0.4.0)
     coderay (1.1.0)
     coffee-script (2.2.0)
       coffee-script-source
       execjs
-    coffee-script-source (1.6.3)
+    coffee-script-source (1.7.0)
     daemons (1.1.9)
     erubis (2.7.0)
     ethon (0.6.2)
@@ -46,7 +46,7 @@ GEM
     progress_bar (1.0.0)
       highline (~> 1.6.1)
       options (~> 2.3.0)
-    pry (0.9.12.4)
+    pry (0.9.12.6)
       coderay (~> 1.0)
       method_source (~> 0.8)
       slop (~> 3.4)
@@ -56,7 +56,7 @@ GEM
     rack-test (0.6.2)
       rack (>= 1.0)
     rr (1.1.2)
-    sass (3.2.13)
+    sass (3.2.14)
     sinatra (1.4.4)
       rack (~> 1.4)
       rack-protection (~> 1.4)