Change in wiki page from "Mathematical Operators" to "Mathematical and Aggregate Operators"
move toList, reduce, concat, toSortedList, toMap, and toMultiMap to that page
deprecate aggregate in favor of reduce
[should I move takeLast, last, and takeLastBuffer to the Aggregate operators page? they don't operate on the aggregate, exactly, but they do wait until the source completes before emitting anything]
javadoc improvements
* add "see also" notes about hidden Rx.NET "asyncFoo" methods to Observable.java
* reformat BlockingObservable javadoc comments to Oracle formatting standards
* add links to RxJava Wiki & MSDN web pages as "see also" links in BlockingObservable javadocs
correcting typo causing build failure
Merge pull request #694 from Netflix/docs

Change page from "Mathematical Operators" to "Mathematical and Aggregate Operators"