Remove implementation of 'reject' (duplicate of 'filterfalse')
Support PyPy3
Merge pull request #61 from microamp/pypy3

Support PyPy3, thanks @microamp
Merge pull request #60 from microamp/remove-reject

Remove implementation of 'reject' (duplicate of 'filterfalse'), thanks to @microamp
Trim empty spaces on iters.py and tests.py
Implement first_true function
Add first_true to README (this commit also trims whitespaces on README)
Merge pull request #62 from gabrielpjordao/first_true

Implement first_true function, thanks to @gabrielpjordao