added numpy.sort, tests, and docstring for numpy.array.sort

Closed Bitbucket Importer requested to merge bitbucket/declined-pr-8 into branch/default

Created originally on Bitbucket by yasirs (Yasir Suhail)

Changesets for this Pull Request have not been imported, because it had been already declined on Bitbucket. Marked as closed by the import user.

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