Updated slides' Makefile. Subdir selection made easier to update.
error handling in Dia I/O
Code/FFI: flush stdout
Slides/04: Impure/FFI
 Slides/04: strumienie
Merge branch 'master' of https://github.com/mbenke/zpf2013
Merge pull request #1 from nietaki/slides_makefile

Updated slides' Makefile. Subdir selection made easier to update.
Make a940727 work on OS X
Slides/05/monad: start
05/monad: Kleisli, Free
Idris: forgotten files
Labs/05: start
05/monad: more succinct State
Labs/05: Cont
monad html
05/monad: popstpone Free, add example
Labs/01: forgotten Makefile change
Reader example: eval; deduplicate
05/monad: html
05/monad: move Pointed