Support lambda-based default values for params

[myitcv]

The test gives an example of what we're looking for here:

params do
  optional :random, default: -> { Random.rand }
  optional :not_random, default: Random.rand
end
get '/numbers' do
  { random_number: params[:random], non_random_number: params[:non_random_number] }
end

[dblock]

Very nice. Could you please update CHANGELOG and README, please via git commit --amend. Thanks!

[myitcv]

Sure will. Clearly being a bit slow here... but post --amend how do I re-push without deleting and recreating the branch?

[dblock]

You force-push it, git push origin branch -f.

[myitcv]

:-( I feared as much.

Ok, that should be done now.

[dblock]

Check travis, you have offended the Rubocops :)

[dblock]

Put Features above, and move * Your contributions here. into it, please.

[dblock]

README still needs the documentation that this construct supports lambdas.

[myitcv]

Sorry, sloppy work on the README and CHANGELOG updates - thanks for the catches. They are now committed, as are the Rubocop fix and an update to .rubocop.yml to ignore binstubs created bin dir.

[myitcv]

@dblock - is this now good to be pulled?

Let me know if there is anything else outstanding.

Much appreciated.

[dblock]

Merged, good work.