Changelog for io-classes-1.4.0.0

Revsion history of io-classes

Add new MonadInspectMVar class with an inspectMVar function for accessing an MVar in an underlying monad (if applicable). This is mainly useful for io-sim, since the underlying monad is ST. IO has no underlying monad, so the provided instance for IO defaults inspectMVar to tryReadMVar.
Add some Haddock documentation to MonadDelay

Control.Monad.Class.MonadMVar is now deprecated in favour of Control.Concurrent.Class.MonadMVar.

MonadMonotonicTime morphed into MonadMonotonicTimeNSec which supports getMonotonicTimeNSec from "base". MonadMonotonicTime can be found in new package si-timers.
A simplified MonadTimer which is using time in microseconds encoded as Int rather than DiffTime. The previous interface can be found in the package si-timers.
The non standard timer API is moved from MonadTimer to a MonadTimerFancy type class which can be imported from Control.Monad.Class.MonadTimer.NonStandard module.

fixed tryTakeMVarDefault, takeMVarDefault, putMVarDefault and isEmptyMVarDefault.
Implemented the proper readMVar semantics.
Added tryReadMVar to MonadMVar type class.
Moved MVarDefault to io-sim package.