Almost equal assertions

[apatil]

Hello,

This pull request adds 'almost equal' assertions like NumPy's. See http://docs.scipy.org/doc/numpy/reference/generated/numpy.testing.assert_almost_equal.html . These are useful for testing special functions (for example, http://en.wikipedia.org/wiki/Gamma_function) and other numerical functions in which fine implementation details such as order of operations can slightly affect the result.

Anand

[logicalparadox]

I definitely like the concept. I would ultimately like to see this somehow make its way into lib/assertion.js so it can be exposed to all of the interfaces, but that is not a hard requirement for the moment.

If you could also include some tests in test/assert.js then I can include this almost immediately. If not, then I will merge in next time we do a chai sprint.

[logicalparadox]

@josher19 This was never merged as it was missing tests. See above. Also other things. If those are taken care of I would be more than happy to merge them in. Make sure your working off of a recent version of the master branch though.

[josher19]

@logicalparadox: See pull #54

I see what you mean by master branch. Looks like the way you handle inspect has changed.
If it does not merge cleanly, I can re-fork on your master branch and resubmit.