update devise gem

Gemfile.lock

@@ -128,7 +128,7 @@ GEM
     daemons (1.1.9)
     database_cleaner (0.9.1)
     debug_inspector (0.0.2)
-    devise (2.1.2)
+    devise (2.1.3)
       bcrypt-ruby (~> 3.0)
       orm_adapter (~> 0.1)
       railties (~> 3.1)
@@ -219,7 +219,7 @@ GEM
       multi_json (~> 1.0)
       multi_xml
     httpauth (0.2.0)
-    i18n (0.6.1)
+    i18n (0.6.4)
     journey (1.0.4)
     jquery-atwho-rails (0.1.7)
     jquery-rails (2.1.3)
@@ -343,7 +343,7 @@ GEM
     rb-fsevent (0.9.2)
     rb-inotify (0.8.8)
       ffi (>= 0.5.0)
-    rdoc (3.12.1)
+    rdoc (3.12.2)
       json (~> 1.4)
     redcarpet (2.2.2)
     redis (3.0.2)
@@ -428,7 +428,7 @@ GEM
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
     thor (0.17.0)
-    tilt (1.3.3)
+    tilt (1.3.4)
     timers (1.1.0)
     treetop (1.4.12)
       polyglot

config/initializers/devise.rb

@@ -99,7 +99,7 @@ Devise.setup do |config|
 
   # ==> Configuration for :validatable
   # Range for password length. Default is 6..128.
-  # config.password_length = 6..128
+  config.password_length = 6..128
 
   # Email regex used to validate email formats. It simply asserts that
   # an one (and only one) @ exists in the given string. This is mainly

config/locales/devise.en.yml

@@ -17,6 +17,7 @@ en:
       unauthenticated: 'You need to sign in before continuing.'
       unconfirmed: 'You have to confirm your account before continuing.'
       locked: 'Your account is locked.'
+      not_found_in_database: 'Invalid email or password.'
       invalid: 'Invalid email or password.'
       invalid_token: 'Invalid authentication token.'
       timeout: 'Your session expired, please sign in again to continue.'