Fixed deprecation warnings from migrations

db/migrate/20131231134936_create_schools.rb

@@ -4,7 +4,7 @@ class CreateSchools < ActiveRecord::Migration
       t.string :name
       t.integer :score
 
-      t.timestamps
+      t.timestamps null: true
     end
   end
 end

db/migrate/20131231134955_create_weights.rb

@@ -3,7 +3,7 @@ class CreateWeights < ActiveRecord::Migration
     create_table :weights do |t|
       t.integer :max
 
-      t.timestamps
+      t.timestamps null: true
     end
   end
 end

db/migrate/20131231135039_create_wrestlers.rb

@@ -7,7 +7,7 @@ class CreateWrestlers < ActiveRecord::Migration
       t.integer :seed
       t.integer :original_seed
 
-      t.timestamps
+      t.timestamps null: true
     end
   end
 end

db/migrate/20140120175252_create_tournaments.rb

@@ -6,7 +6,7 @@ class CreateTournaments < ActiveRecord::Migration
       t.string :director
       t.string :director_email
 
-      t.timestamps
+      t.timestamps null: true
     end
   end
 end

db/migrate/20140122030856_devise_create_users.rb

@@ -31,7 +31,7 @@ class DeviseCreateUsers < ActiveRecord::Migration
       # t.datetime :locked_at
 
 
-      t.timestamps
+      t.timestamps null: true
     end
 
     add_index :users, :email,                :unique => true

db/migrate/20140124174110_create_matches.rb

@@ -9,7 +9,7 @@ class CreateMatches < ActiveRecord::Migration
       t.string :win_type
       t.string :score
 
-      t.timestamps
+      t.timestamps null: true
     end
   end
 end

db/migrate/20140125065007_create_mats.rb

@@ -4,7 +4,7 @@ class CreateMats < ActiveRecord::Migration
       t.string :name
       t.integer :tournament_id
 
-      t.timestamps
+      t.timestamps null: true
     end
   end
 end