Fix weighted sampling without replacement#239

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nalimilan merged 3 commits intoJuliaStats:masterfrom

bkamins:patch-1

May 4, 2017

Commits on Feb 15, 2017

Fix #238
bkamins
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Commits on Feb 16, 2017

weighted sampling without replacement: added tests and small fixes
bkamins
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Commits on May 3, 2017

removed redundant import in tests
bkamins
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