Allow cobrands to set their own path to pin files

New cobrand function of pin_path that sets the path to where the image
files for pins are located. Defaults to /i

This still means they need to use the same file names but they can at
least put those in a cobrand directory rather than having to overwrite
the files in /i or fudge it with pin_colour
Fetch/send archive of modules before/after tests.

Before running carton install, see if we have a stored copy of the local
directory on ge.tt - if so, download and use that instead. After running
the tests, if we didn't download a copy, bundle it up and upload it to
ge.tt for use next time.
remove survey links
remove survey link from front page
Update colours for Trinidad and Tobago cobrand

Add in we/cobrand directory with basic sass files, update colours file
and set background on 'click map to report' banner
upgrade google analytics code to use universal snippet
send a virtual page view when we click on the map

Only if universal analytics turned on and on the fixmystreet cobrand
Use local DateTimes in dashboard and its tests.

Otherwise oddities arise due to summer time differences
putting a BST now-6d23h time behind a UTC now+1s-1w.
Update old-style open311 script to use bodies.

Add some comments to the top of the open311 bin scripts.