added cofold mfe bindings
added cofold

also making sure to (re)set cutpoint more often
cofold partfun wrapper included
cleanup
bug in cofold function name

yeah...
trying to include some vienna rna stuff
fully self-contained Haskell-ViennaRNA2
Merge branch 'cbits'

We now directly carry with us the relevant c-code, instead of trying to
use the .a / .so files.