Rename Configuration#modules into #prepare

[jodosha]

Please remember to update the README too.

[runlevel5]

@jodosha can you please explain the motive behind this decision?

[jodosha]

@joneslee85 IMO that initial name was wrong: we don't define the modules to include, but we pass a code block. That block is evaluated when Lotus::Action gets included. So we are preparing the action.

In code terms, if it was something like the following code, it could've had a sense to name it #prepare.

configure do
  modules Lotus::Action::Session, Lotus::Action::Cookies
end

But with the current implementation we can do something more than listing modules:

configure do
  prepare do
    include Lotus::Action::Sessions
    use SomeMiddleware
    before :do_something
  end
end

What do you think?

[runlevel5]

@jodosha i see. I am cool with the idea of passing a code block but I am wondering how you extend/override?