fixes buildscript ->  https://github.com/purescript/purescript/releases/tag/v0.6.2
adds reduce and zip
make flatMapLatest default bind
Update Observable.purs
add delay
Fix.
Merge pull request #1 from kRITZCREEK/flatMapLatest-bind

Flat map latest bind
Cleanup.
More Cleanup.
Update Observable.purs
Merge pull request #4 from kRITZCREEK/master

Add Methods. Use FlatmapLatest as bind.