Update devise to latest version of 2.2.x

Gemfile.lock

@@ -38,7 +38,7 @@ GEM
     asciidoctor (0.1.3)
     awesome_print (1.2.0)
     backports (3.3.2)
-    bcrypt-ruby (3.1.1)
+    bcrypt-ruby (3.1.2)
     better_errors (1.0.1)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
@@ -101,7 +101,7 @@ GEM
     database_cleaner (1.1.1)
     debug_inspector (0.0.2)
     descendants_tracker (0.0.1)
-    devise (2.2.5)
+    devise (2.2.8)
       bcrypt-ruby (~> 3.0)
       orm_adapter (~> 0.1)
       railties (~> 3.1)
@@ -312,7 +312,7 @@ GEM
     omniauth-twitter (0.0.17)
       multi_json (~> 1.3)
       omniauth-oauth (~> 1.0)
-    orm_adapter (0.4.0)
+    orm_adapter (0.5.0)
     pg (0.15.1)
     poltergeist (1.4.1)
       capybara (~> 2.1.0)