Merge branch 'pg_fixes' into 'master'

Postgres fixes

For applications migrated from MySQL to PostreSQL it fixes some issues
Fixes #1060

app/models/project.rb

@@ -28,6 +28,8 @@ class Project < ActiveRecord::Base
   include Gitlab::VisibilityLevel
   extend Enumerize
 
+  default_value_for :imported, false
+
   ActsAsTaggableOn.strict_case_match = true
 
   attr_accessible :name, :path, :description, :issues_tracker, :label_list,

app/models/web_hook.rb

@@ -17,6 +17,10 @@
 class WebHook < ActiveRecord::Base
   include HTTParty
 
+  default_value_for :push_events, true
+  default_value_for :issues_events, false
+  default_value_for :merge_requests_events, false
+
   attr_accessible :url
 
   # HTTParty timeout