Create a Bloom Filter from an iterator

[johandahlberg]

This PR simply adds the option of creating a Bloom Filter directly from an iterator. I found this useful in my own code, so perhaps someone else will also find it useful.

[codecov-io]

Codecov Report

Merging #637 into develop will increase coverage by 0.04%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop     #637      +/-   ##
===========================================
+ Coverage    82.09%   82.14%   +0.04%     
===========================================
  Files          111      111              
  Lines         5156     5157       +1     
  Branches       457      468      +11     
===========================================
+ Hits          4233     4236       +3     
+ Misses         923      921       -2

Impacted Files	Coverage Δ
.../main/scala/com/twitter/algebird/BloomFilter.scala	94.34% <100%> (+0.89%)	⬆️
.../main/scala/com/twitter/algebird/Applicative.scala	61.29% <0%> (-3.23%)	⬇️
...c/main/scala/com/twitter/algebird/MapAlgebra.scala	76.69% <0%> (-0.98%)	⬇️
...src/main/scala/com/twitter/algebird/Interval.scala	69.04% <0%> (ø)	⬆️
.../main/scala/com/twitter/algebird/Approximate.scala	90.32% <0%> (+1.61%)	⬆️
.../main/scala/com/twitter/algebird/Successible.scala	91.66% <0%> (+4.16%)	⬆️

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[sritchie]

looks great!

[sritchie]

Thanks for this, @johandahlberg, and thanks for the test!