Chris Veness' discussion of using the spherical law of cosines (http://www.movable-type.co.uk/scripts/latlong.html) suggests it gives well-conditioned results "around 1 metre" in JavaScript (this assumes a sphere with 6,371km radius).
In Chrome 33, Math.pow(Math.cos(Math.PI / 4), 2) yields 0.4999999999999999. When we take the arccosine of twice this, we get something significantly different than zero. Multiplying by 6371 means we can't assert that this is within 1e-9 of zero.
The Vincenty formula can fail to converge for antipodal points (see http://en.wikipedia.org/wiki/Vincenty's_formulae#Nearly_antipodal_points), so those test cases are removed. These tests fail with the latest V8 due to optimization of trig functions with lookup tables. For example, Math.cos(Math.PI / 2) is no longer calculated based on the value of Math.PI / 2 (which is different than the actual value of π / 2). Instead, values close to multiples of π / 2 are determined to be 0 (which is arguably what you want). Previously the tests were relying on very small numbers being returned in this case.
This reverts 4d619d71b1 (see #1527), going back to what we had after e13075f6ff (see #881).
To avoid the 404 in the hosted examples, the css is copied to the same relative path when hosted as during development.
The makeChildAppender function is used for adding a node of a
type with maxOccurs=1. For adding nodes of a type with
maxOccurs>1, the new makeChildrenAppender function was added.
With this new function, it turned out that more convenience for
creating node factories is required. The makeChildNodeFactory
function was renamed to makeSimpleNodeFactory, and it now can
create node factories where not only the namespace, but also the
node name can be fixed.
