updates and corrections, +phantom ops page
Changed uppercase to lowercase in directory documentation/Operators
Merge pull request #63 from staltz/develop

Changed uppercase to lowercase in directory documentation/Operators
Merge branch 'develop' of https://github.com/ReactiveX/reactivex.github.io into develop
RxJS backpressure operator diagrams
page to describe various backpressure-supplementing operators (not the page about the topic of backpressure & reactive pull)
+ update operator template page to reflect new page design
Improved lang_operator plugin to accept description arg
add RxJS withLatestFrom(); convert to new layout
now with sample code & distribution information
withLatestFrom operator diagram
convert the rest of the operator pages to the new layout; add them to the index page
Merge branch 'develop' of https://github.com/staltz/reactivex.github.io into staltz-develop

Conflicts:
	documentation/operators/buffer.html
bugfix: unclosed {lang} tag
Merge branch 'staltz-develop' into develop
new ConnectableObservable-related diagrams
new ConnectableObservable-related doc pages
Merge branch 'develop' of https://github.com/ReactiveX/reactivex.github.io into develop
new pages to document Connect/Publish/Refcount and related operators; plus flesh-out operator index page
canonical Replay diagram
Merge branch 'develop' of https://github.com/ReactiveX/reactivex.github.io into develop