Add ability to configure hooks.

[rwjblue]

Adds custom callback hooks to be executed when triggered by a POST to /:suite/hooks/:group.

This is helpful in our application to allow better integration testing while still being able to reset the database at key intervals.

We are using the following:

# config/initializers/teaspoon.rb

Teaspoon.setup do |config|

  config.suite do |suite|
    suite.hook :clean do
      DatabaseCleaner.clean
    end
  end
end

// support/cleanDatabase.js (required from test_helper.js)
window.cleanDatabase = function(suite){
  if (!suite) { suite = 'default' };

  jQuery.ajax('/teaspoon/' + suite + '/hooks/clean', {
    async: false,
    type: 'POST'
  });
}

[jejacks0n]

:+1: I like this, and will merge it when specs are passing. =)

Thanks!

[rwjblue]

The test failure has been fixed (I forgot that the tmp/ directory was not present in the repo so writing to it throws an error when run by Travis).

@jejacks0n - Please let me know if there is anything else that needs tweaking/modification...

[jejacks0n]

@rjackson, nope, everything looked pretty good from my review.

Thanks again! I'm thankful for good pull requests with good specs. =)

[rwjblue]

Awesome, thank you!