Update the README to point to the Wiki.
removing dependency on index.js: makes bootstrapping the build from git checkout much easier
add package.json dependency to make install
adding make prepare (which calls make install).  More inline with make traditions
biting the bullet, renaming install target to prepare (more in-line with it's meaning)
Fix another rounding bug with SI-format.

Turns out 1400 * .001 is 1.4000000000000001, but 1400 / 1000 is 1.4.
removing make package.json dep on d3.vs.json, since it've been removed in the source code
Removing make prepare target.
removing .js from core require
add browserify compatibility
Update README blurb.
Fix d3.xhr for local URIs.

The test for local URI is based on jQuery's.  Although Chrome has strict
permissions, other browsers allow local URIs to be retrieved as long as
the same-domain policy is respected e.g. Safari.

We also check for a cross-domain request as req.status === 0 means
failure in this case.
Simpler workaround for local d3.xhr.

If the error flag is set, the response attribute [1] should be the empty
string or null.  So even if a request fails and the response has been
partially loaded, this logic should still work.

This check will fail for local requests where the response entity body
is the empty string, but I don't think it's possible to detect this
situation in current browser implementations. jQuery has the same issue,
for example.

[1]: http://www.w3.org/TR/XMLHttpRequest/#the-response-attribute
Fix commit 637896b to use src/package.js.
"Bundle" interpolation for single-element arrays.

In future we may want to generate some kind of loop, but it's not clear
what orientation such a loop should have, so perhaps a "non-line" like
this is better as a default.
Add missing semicolon to mercator example.
Fix dangling global in d3.layout.hierarchy.
Fix dangling global in d3.layout.pie.
Merge branch 'fix-si-format-rounding' into 2.9.2
Merge branch '2.9.2'