Chemical

New Features

* Added `current()` chemical that allows you to look at the current element that has been returned from previous calls to next().

Bug Fixes

* Found a bug in the `trait()` function that needlessly returned a closure rather than the class/function it was wrapping. Since it's only job is to add the class/function to the `it` class, it didn't need to also return the wrapper function.

**Features**

* Choose from over 40 iterators and aggregators to assist you with iterating over collections
* Implement your own custom iterators or value-producing aggregators and use them without modification anywhere in your program
* Iterators lazily compute the next value so overhead is kept to a minimum
* Source code has been verified with 50 unit tests and they run on Windows, MacOS, Linux, and Python3.6+