Add marble diagrams to new operators & variants.
Add javadoc "@deprecated use..." where appropriate.
Some javadoc comment reformatting (e.g. overlong lines).
Create /src/perf for Performance Tests

- Move existing performance tests into this source folder.
- Not building via Gradle yet … I have yet to figure that part out.
Start of Performance Testing Operators

These are examples of how we should proceed. Very likely though we want to use something like Caliper: https://code.google.com/p/caliper/
Merge pull request #760 from benjchristensen/perf-tests

Performance Tests Source Folder
adding diagrams to javadocs for replay(selector) variants
adding javadoc marble diagram for the mergeMap(next,completed,error) variety
Merge pull request #762 from Netflix/docs

adding javadoc marble diagram for the mergeMap(next,completed,error) variety
A variety of improvements to the javadoc text.
Zip fix for multiple onCompleted and moved unsubscribe outside the lock.
Merge pull request #765 from Netflix/docs

A variety of improvements to the javadoc text.
Merge pull request #767 from akarnokd/ZipFixes

Zip fix for multiple onCompleted and moved unsubscribe outside the lock.
Merge branch 'master' of https://github.com/Netflix/RxJava into replay-subject-with-capacity