Operator Generate again

[akarnokd]

Issue #49

• Updated tests to use TestScheduler
• Removed class TimeSpan and the timeSelectors are expected to return a nanosecond-resolution value.

[cloudbees-pull-request-builder]

RxJava-pull-requests #447 SUCCESS
This pull request looks good

[zsxwing]

A small tip about github: You can continue to push any commits to your remote branch. The pull request will be updated automatically.

If you find some conflicts between your remote branch and your local branch, you can use --force to override your remote branch by force. Github will keep the pull request consistent with your remote branch. I think it's better than opening another pull request.

[akarnokd]

@zsxwing I know; my very first pull was such but I received the tip to use clean branches, especially when the master changes above me.

[zsxwing]

Do you mean #509 (comment) ? I think @benjchristensen was suggesting git rebase.

[zsxwing]

In addition, if it's hard to rebase it on master, I also think a new pull request is good.

[benjchristensen]

Removed class TimeSpan and the timeSelectors are expected to return a nanosecond-resolution value.

We need to support long delayTime, TimeUnit unit as discussed at:#509 (comment)