Pub and minor syntax updates

[thomasuster]

I added pub files to both the library and the test application. This should allow others to import your lib as well as run the test with greater ease. (http://www.dartlang.org/docs/pub-package-manager/versioning.html)

I also added some minor syntax changes relates to API changes. Math.random is now seeded with date.millisecondsSinceEpoch.

[daegalus]

Looks good to me, Have been busy lately so I haven't been paying attentions to recent updates to Pub. If you can, can you update the readme.md where necessary with the new Pub stuff. If not, I will do it a bit later myself when I get some time.

[thomasuster]

Pub is still pretty janky on windows so I'm going to try a sanity check on Ubunto before updating the read me.

[daegalus]

I just added UUIDv5 locally, and while I was working with it, I found that your time seed to math.random broke v4 uuids. At least it does on my Mac.

95686cd4-9568-4cd4-9568-6cd495686cd4
^^^^     ^^^^      ^^^^     ^^^^
1c4d923d-1c4d-423d-9c4d-923d1c4d923d
^^^^     ^^^^      ^^^^     ^^^^

Since the seed is optional, i set it to Math.Random() without a seed, and it fixed the problem right away. I will submit code in a little bit.

[thomasuster]

Ahh, my bad. Unit tests were passing but most likely I missed something. Good catch.

[daegalus]

No worries, actually, there are no unit-tests for v4 because they are always random, and they never use the same seed. If i try to use a same seed, if something like that breaks, it still won't be caught, because the same logic will produce the same UUID for that seed.

Edit: Actually, ignore that, I can just compare it to a string fo what its supposed to be. I'll add the test now before commiting in a bit.