Upgraded to Redmine 2.3.2

Note that you must run
	rake db:migrate RAILS_ENV=production
in the console after updating to this version.

Detailed instructions can be found here:
http://www.redmine.org/projects/redmine/wiki/RedmineUpgrade
Be aware that the article's target is not RedHat OpenShift Online cloud
service.
Add day of month header to the Gantt chart.