Simplify syntax further

[ccallebs]

The more I use this, the more I think it shouldn't be actual classes that define hooks, rather more simple "rspec-esque" blocks of code. For example:

class SampleHooks < Pokey
  define_hook "Optional description" do |hook|
    hook.interval = 10
    hook.endpoint = "http://blarg.com/api/endpoint"
    hook.http_method = :patch
    hook.data do |data|
      data.id = 1
      data.something_else = "string"
    end
  end

  define_hook do |hook|
    hook.interval = 5
    # etc
  end
end

Then you could simplify define as many hooks as you wanted in any given file. I'll shoot for release in 0.3.0.

[ccallebs]

This will break compatibility with ccallebs/pokey-sendgrid but should be easy enough to fix.