Add ordinal support for dutch (nl) locale

[kreintjes]

It is not perfect yet, but it is a start.

I did not know exactly how to fix these problems:
42nd = 'tweeenveertigste', but should be 'tweeënveertigste' (this goes wrong because 42 = 'tweeenveertig' is also wrong)
131st = 'honderdsteéénendertigste', but should be 'honderdéénendertigste'
133rd = 'honderdstedrieendertigste', but should be 'honderddrieëndertigste'
1000st = 'éénduizendste', but should be 'duizendste' (this goes wrong because 1000 = 'éénduizend' is also wrong)
4256th = 'vierduizend tweehonderdzesenvijftigste', but should be 'vierduizend tweehonderdzesenvijftigste'

For some correct examples (only in Dutch) see: http://woordenlijst.org/leidraad/6/9

[coveralls]

Coverage decreased (-0.0%) when pulling c40f4cb on kreintjes:master into 6b681be on kslazarev:master.

[dblock]

I recommend you write failing tests for all those other examples, someone can maybe jump in to help fix them.

[coveralls]

Coverage decreased (-0.0%) when pulling 7d054f7 on kreintjes:master into 6b681be on kslazarev:master.

[kreintjes]

Added extra tests for the failing examples (including the currently wrong non ordinal numbers). If someone could fix these examples or point me into the direction to fix them, I (and other Dutch speaking people) would be glad.

[miks]

I can't fix tests because I don't know Dutch, for example:

       expected: "vierduizend tweehonderdzesenvijftigste"
                got: "vierduizend tweehonderdstezesenvijftigste" (using ==)

If you can provide language logic, at least I can try.