Optionally allow broadcasting after each partial is generated

[rickychilcott]

If the user specifies to broadcast_immediately: true, then initiate a cable_ready.broadcast after each resource is rendered in https://github.com/julianrubisch/futurism/blob/v0.7.2/lib/futurism/channel.rb#L18-L41

[rickychilcott]

@julianrubisch are you OK with this and having the syntax be broadcast_immediately: true?

Example:

<%= futurize @posts, broadcast_immediately: true, extends: :div do %>
  <!-- placeholder -->
<% end %>

[marcoroth]

How about broadcast_now to make it as close as possible to ActionMailer and ActiveJob ?

[rickychilcott]

And shorter/less likely to misspell. I like it!

[julianrubisch]

Hmm I'd like something along the lines of broadcast_each, actually

[julianrubisch]

I suggest you wait until I'm done with #78, otherwise we'll produce merge conflicts

[rickychilcott]

Ok to move this one forward @julianrubisch?

Does the following still feel right?

<%= futurize @posts, broadcast_each: true, extends: :div do %>
  <!-- placeholder -->
<% end %>

[julianrubisch]

Yes please!