add iterateEval method
Add process1.delete
add append option to fileChunkW
Update the documentation of receive1{,Or}. Closes #257
Merge pull request #263 from ezhulenev/append-to-file

Add append option to fileChunkW
Merge pull request #238 from jilen/generalize_iterate

generalize iterate method
Merge pull request #247 from fthomas/delete

Add process1.delete
Document io.fileChunkW's append parameter
Moved MonadPlus[Process] and Hoist[Process] into ProcessInstances.scala
Merge remote-tracking branch 'upstream/master' into feature/monad-trans