[#1450] remove min file as it does not work properly with fanstatic
[#1451] use site url to get callback url for datapusher
[#1452] Fix text preview tests
[#1453] remove item for select list if config not set by adding helper and change validator to fail when config is set with empty string
Merge pull request #1452 from okfn/1452-textpreview-tests

Text preview tests fail when using production JS scripts
Merge branch '1450-resource-reordering-production'
Merge branch '1453-sysadmins-not-create-unown-datasets'
[#1451] pep8 and a few things to make things a look nicer
[#1451] add back in rstrip
[#1452] Fix PEP8
Merge pull request #1458 from okfn/1452-textpreview-tests

[#1452] Text Preview fails - Fix PEP8
Merge branch '1451-use-site-url-for-datastore-callback'
Merge branch 'master' into 1449-cant-delete-extra