Build custom D3 for our usage

Use the D3 build system, SMASH, to build a custom D3 with our
unscaled pack layout and only the modules we need.

QA in devel, as well as in a real env (suggest deploying several
services from the command line to test the pack layout,
cs:~hatch/precise/failtester is a lightweight one; test using
http://jujugui.wordpress.com/2013/10/15/if-you-want-to-run-a-custom-gui/
or similar)
Fixing D3 cruft in tests.
Responding to reviews: comments updated.
Merge pull request #208 from makyo/make-d3

Use the D3 build system, SMASH, to build a custom D3 with our
unscaled pack layout and only the modules we need.

QA in devel, as well as in a real env (suggest deploying several
services from the command line to test the pack layout,
cs:~hatch/precise/failtester is a lightweight one; test using
[something like this](http://jujugui.wordpress.com/2013/10/15/if-you-want-to-run-a-custom-gui/))