Add some commit callbacks (tpope#465)

Author: bucketheadv

autoload/rails.vim

@@ -3757,8 +3757,8 @@ function! rails#buffer_syntax()
       if buffer.type_name() ==# 'model' || buffer.type_name('model-record')
         syn keyword rubyRailsARMethod default_scope enum named_scope scope serialize store
         syn keyword rubyRailsARAssociationMethod belongs_to has_one has_many has_and_belongs_to_many composed_of accepts_nested_attributes_for
-        syn keyword rubyRailsARCallbackMethod before_create before_destroy before_save before_update before_validation before_validation_on_create before_validation_on_update
-        syn keyword rubyRailsARCallbackMethod after_create after_destroy after_save after_update after_validation after_validation_on_create after_validation_on_update
+        syn keyword rubyRailsARCallbackMethod before_create before_destroy before_save before_update before_validation before_validation_on_create before_validation_on_update before_commit
+        syn keyword rubyRailsARCallbackMethod after_create after_destroy after_save after_update after_validation after_validation_on_create after_validation_on_update after_create_commit after_update_commit after_destroy_commit
         syn keyword rubyRailsARCallbackMethod around_create around_destroy around_save around_update
         syn keyword rubyRailsARCallbackMethod after_commit after_find after_initialize after_rollback after_touch
         syn keyword rubyRailsARClassMethod attr_accessible attr_protected attr_readonly has_secure_password has_secure_token store_accessor