Link through from all reports page to sub categories

Add a type parameter to the /reports/body page to restrict list by
problem category.
Only link to report categories that have entries.

Fixes #798
link to fms.org for code and add fms platform text
update style of main content box

move it up on the front page so it overlaps the yellow
make footer have a black background
tweak display of footer content

mostly adding image replacement to the fms platform link and some
spacing tweaks
add an additional nav footer at the bottom of the page

duplicates the top nav mostly
make the postcode entry box large on FMS

also change the fonts, tweak the submit button size
update mysociety tab

update to new logo
remove donate and our site links
sort out display on mobile

hide footer menu on mobile
add privacy link to main menu, hide on desktop
Internet Explorer tweaks for front page redesign

Make mySociety tab wider to fit logo
Just display text for FixMyStreet Platform link
remove border on front page .content to stop odd line under footer
split out footer marketing to own template

allows it to be overridden in cobrands without the need to provide a
whole new footer template
Use https for UK site where appropriate

Council redirects, BASE_URL comparisons, hard coded links, email
signatures

For #488
Make external links HTTPS where possible.

And fix a couple that have redirected.
Display a banner to non UK FixMyStreet visitors

only on FMS and only if from outside the uk

Fixes #571
Update secure proxy list to include www.fixmystreet.com.
Merge branch 'use-https-urls-for-uk'
Merge branch 'mysociety/798-show-reports-subset'
Merge branch 'mysociety/771-front-page-changes'

Conflicts:
	templates/web/fixmystreet/footer.html
Merge branch '571-show-local-deploys-banner'

Conflicts:
	web/cobrands/fixmystreet/base.scss