found and fixed a number of bugs
work in progress: move to conduit
possibly working streaming fasta handler

using conduit 0.5 for now. seems to be working, performs well, and
requires constant memory.
this seems to work
added the possibility to carry the past

having access to the past is important for some applications
adding quickcheck test cases
new removing step sizes

seems easier to just move windows along and keeps the last past window
still working on stuff
quickcheck done, library works

quickcheck currently finds no errors
added the future

we now have present, past, and future windows
added another quickcheck property
one more todo
removed futureData bug
redesigned the whole parsing algorithm.

Using conduit now. In addition, the chunks should always consume a
constant amount of memory.
lot of bugfixes, simple test program
added changelog