Add delayForE
Add throttleE
Add debounceE
Add haddock comments
Expose delayForE, throttleE and debounceE
Do not reverse simultanious events in delayForE

See also https://github.com/maoe/ordrea/commit/64619e5f8f8d26e9103152d64e435c193b4c9ac5#commitcomment-7243746
Merge pull request #3 from maoe/throttle-debounce

Add delayForE, throttleE and debounceE