javadoc improvements:
* diagrams for skip(t), single(), take(t), skipLast(t)
* minor corrections, reformatting of javadoc comments
Merge remote-tracking branch 'origin/master' into docs
Adding diagrams, improving javadocs for sumFoo/averageFoo operators.
Merge remote-tracking branch 'origin/master' into docs
adding diagram to repeat() javadocs
Collect Operator
Merge pull request #701 from benjchristensen/collect

Collect Operator
Mark as Deprecated
Remove Extra Synchronization

The use of flatMap/mergeMap already synchronizes.
Standardize Naming of average/sum methods

See https://github.com/Netflix/RxJava/pull/698#issuecomment-31282416
Merge pull request #703 from benjchristensen/small-tweaks

Small Tweaks
Merge pull request #700 from Netflix/docs

various javadoc improvements
adjust javadocs for new sumFoo()/averageFoo() method names
Merge pull request #705 from Netflix/docs

adjust javadocs for new sumFoo()/averageFoo() method names