[#628] Implement a way to dump a whole datastore resource as csv
Use normal user in datastore search tests
[#628] Add unicodecsv requirement
Update strings files before CKAN 2.0 call for translations

Pull the latest strings from the CKAN 1.8 resource on Transifex into the
po files (some new translations have been added to 1.8 on Transifex,
since 1.8 was released). I've checked these using check-po-files and
they seem okay.

I did not commit the zh_CN (Chinese) or dv (Divehi) strings files as
these currently have 0% translations for CKAN 2.0, maybe they'll be
added before the release.

Update the ckan.pot file with the strings from the source files on the
release-v2.0 branch. I've pushed this updated pot file to Transifex as
the resource CKAN 2.0.

Update the resource slug in .tx/config.

Recompile the mo files from the updated po files.
Add British English translation from Transifex

For now I've added British English to the filtered-out languages, until
we can do the work to get it displaying properly in the Language:
drop-down.

Conflicts:
	ckan/config/deployment.ini_tmpl
[i18n] Pull translations from Transifex

Pulled the latest translations from Transifex with `tx pull`, checked
them with `check_po_files.py`, compiled the mo files with
`compile_messages`.
[#929] Add a step to the release process i18n docs

Add a step to the release process i18n docs, that you have to
cherry-pick the i18n commits from the release branch to master, after
the release has been finalized.
[#948] Use h.url_for_static for placeholder images

Placeholder images in 3 templates were not using h.url_for_static,
causing placeholder images to be broken when CKAN is mounted on
non-root URL.
Merge pull request #628 from okfn/628-datastore-dump

Datastore dumps
[#628] Fix PEP 8 so that the test don't fail any more
Merge branch '948-helper-function-img'
[#628] More PEP8 fixes
Merge pull request #950 from okfn/travis-fix

[#628] Fix PEP 8 so that the test don't fail any more
[#867] Adds better font sizes for headings
[#914] Increases pill line-height to allow for spacing between lines
Merge branch '867-heading-sizes'
Recompile css
Merge branch '929'