combiter v1.0.3 (Release date: 2017-12-04)
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* more concise unittest for subset iterator




combiter v1.0.2 (Release date: 2017-05-17)
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* function name change `incrementaliter` --> `recursiveiter`



combiter v1.0.1 (Release date: 2017-05-15)
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* all iterators inherits `abstractiter` and `iter` class from `iterators` package.
* all iterators are foreach-eable
* added `icartes`, a Cartesian product iterator
* added "value" version of each iterator, `ipermv`, `iconbv`, `isubsetv` and `icartesv`



combiter v0.1.1 (Release date: 2016-09-26)
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* initial version, uploaded on CRAN
* `iperm`, `icomb` and `isubset` implemented
