CCHash now uses murmur hash
changed comments, add _tags file
more hash functions
make a distinction between Hash.state and Hash.t (and private type is bad here)
random generators in several modules, and CCRandom to bind them all with fuel
monadic combinators for lists and klists
refactored CCrandom (hide fuel, too complicated, but provide a fix operator);
bench_hash to compare hash combinators to the default hash function
tests for bitvectors
update of FQueue with a richer, more consistent api
CCFQueue is now a functional double-ended queue
make test will now run both oUnit and qtest
fix bug in CCFqueue
updated CCLeftistheap with a brand new functorial interface,
with more conversion functions, etc.
rename CCLeftistheap to CCHeap, for it is a simpler name
updated readme
merge from dev