Fix Single.create diagram
More Single marbles.
Add Single.concat marbles, refresh wiki
Update wiki from docs
Some helper icons
Add marbles, update Additional-Reading.md
Fix Completable.startWith.p again
Fix Completable.startWith.p
Fix Completable.retry.n
Fix Completable.repeat.n
2.x: Add final Completable marbles
Add more Completable marbles 07/19b
Adjust Completable.hide marble
Add Completable.onErrorComplete(Predicate) marble.
More Completable marbles 07/19a
Add Single.amb & ambArray marbles
Adust Completable.andThen.m
Add Completable.blockingGet(timeout)
Add blockingAvait(timeout) marble
Fix Completable.using diagram
Marbles 7-18a
Add onErrorX and fromX marbles
Add Single.repeatUntil marble
Fix Completable.merge.pn diagram
Add Completable.timer marbles
Add Single.repeatX marbles
Add Completable.mergeX marbles, Completable.never
Marbles for Completable.fromX
Add Completable.defer
Add Completab.error(callable)