Increasing timeout

Using low timeout values causes non-determinism in some build environments.
javadocs: add missing @see links; correct broken link URLs; standardize formatting/capitalization/punctuation
ToList operator needs to ignore backpressure
Update CONTRIBUTING.md

updating the date.
Merge pull request #1469 from mattrjacobs/fix-tolist-backpressure

ToList operator needs to ignore backpressure
Add test of backpressure to OperatorAll
OperatorAny needs to handle backpressure
Merge pull request #1472 from mattrjacobs/add-unit-test-to-operator-all

Add test of backpressure to OperatorAll
Merge pull request #1473 from mattrjacobs/handle-backpressure-in-any-operator

OperatorAny needs to handle backpressure
Ignore backpressure for OperatorToObservableSortedList
Merge pull request #1474 from mattrjacobs/ignore-backpressure-operator-tosortedlist

Ignore backpressure for OperatorToObservableSortedList
Backpressure Fixes and Docs

Docs for operators that don't support backpressure, particularly all the temporal operators.

Fixes for several that needed to request(1) or request(Long.MAX_VALUE).
Merge pull request #1489 from benjchristensen/terminal-operator-backpressure

Backpressure Fixes and Docs
non-deterministic timeouts on slow machines
Merge pull request #1490 from benjchristensen/unit-tests

non-deterministic timeouts on slow machines
Concat Outer Backpressure

Fixed https://github.com/Netflix/RxJava/issues/1481
Merge pull request #1491 from benjchristensen/concat-backpressure-outer

Concat Outer Backpressure
TODO for removing this timeout

this code is just for finding bugs during the 0.20-RCs
Upgrade to Quasar 0.6.0
retryWhen/repeatWhen