factor out moving over loci to an iterator to allow for folds
adding private modifier to sliding window iterator
adding tests for window fold
additional comments on SlidingWindowsIterator
update to remove mutating windows in has next and do so in next
a few line length and style cleanups
move sldiingwindow classes to correct package folder
more long lines and style nits
ruthlessly privatize SlidingWindowIterator methods
experiment: type alias `PerSample` for `Seq`
Merge pull request #193 from hammerlab/ryan-nits

a few line length and style cleanups
replace seq with PerSample in SlidingWindowsIterator and improving comments
Merge branch 'slidingwindowitr' of https://github.com/hammerlab/guacamole into slidingwindowitr-update
comment on fold test case
cleanup, comment and expand window fold test case
Merge pull request #189 from hammerlab/slidingwindowitr

Factor out moving over loci to an iterator to allow for folds