Update Django to 1.5.4
Django 1.5.4 requires a default cache
Fix template_loader imports
Fix direct_to_template
Replace django.views.generic.simple.redirect_to
Fix urlpatterns by moving (?i) prefix
Quote all view names in url tags
Add new omero.web.allowed_hosts setting, defaults to '*'
Disable multithreaded development web server
Force Django 1.5 development web server to always run in nothreading mode
Fix import issue.
Merge pull request #1688 from sbesson/11466_tag_clitest

Add CLI tests for tag plugin
merge develop -D org -I include -E exclude: PR 1385 (Update the OMERO VirtualBox image)
merge develop -D org -I include -E exclude: PR 1633 (Upgrade ICE jars to version 3.5.1)
merge develop -D org -I include -E exclude: PR 1646 (OmeroWeb Django upgrade from 1.3.1 to 1.5.4)
merge develop -D org -I include -E exclude: PR 1647 (Fixing the drag behaviour on tiled images for IE (see #11555))
merge develop -D org -I include -E exclude: PR 1652 (Parse modulo and view moduloT)
merge develop -D org -I include -E exclude: PR 1657 (Update copyright and comments in Python integration tests (rebased onto develop))
merge develop -D org -I include -E exclude: PR 1679 (Improve image upload time estimation in OMERO.insight (see #10935))
merge develop -D org -I include -E exclude: PR 1695 (Fixing free drive space issue in webadmin, close #11570)