Add vagrant config.

Added Vagrantfile and simple provisioning script. This sets up the
packages, gems and databases so that `rake db:migrate` is ready to
run. This might be too much and perhaps more should be done by the
user themselves, I'm not sure...
Move vagrant provisioning script to a better location.
Merge remote-tracking branch 'upstream/master' into vagrant
Added some docs for Vagrant usage.

It doesn't currently recomment using Vagrant - there are probably
some bugs to work out in the process before we can do that.
Migrate the database on `vagrant up`.

Also fix the provisioning script so that it runs correctly when
the VM is upped, regardless of whether it's a clean install or
an 'up' of a previously halted VM.
Add some additional information to help people starting out on the project using vagrant, especially if you haven't used vagrant before.
Localisation updates from https://translatewiki.net.
Generate a new style links for node locations in the data browser
Fix link
Update map state when following a client side route
Remove unused file
Fix more links to use new style #map links
Block submission of the export form when the area is too large
Remove unused (and bogus) code
Don't call updateLayers if the new state has no layer config

Fixes #719
Update to rails 4.0.4
Make sure the hash updates properly on browse pages

Rework the way the move listener is disabled during initial
positiong of pages to avoid accidentally leaving it disabled
for the first user move of the map in some cases.
Localisation updates from https://translatewiki.net.
Update to iD v1.3.8
Ignore clicks on history entries if the mouse has moved

Ignore click events on history events if the mouse moves so that
drag selection can work. Fixes #581.