Contributing to open source bundles from vendor directory?

Question

Ideal Situation

Often while working on a Symfony2 project I will spot something I want to change in one of my dependencies. If I could find a way to

Answer 1

FYI, I just tried the very first option:

    "repositories": [{
    "type": "vcs",
    "url": "https://github.com/thujohn/twitter"
}],
"require": {
    "laravel/framework": "4.2.*",
    "thujohn/twitter": "dev-master",
    "anahkiasen/flickering": "^0.1.2",
    "fairholm/elasticquent": "dev-master",
    "facebook/php-sdk-v4" : "~5.0"
},

An it worked fine.

vagrant@dev:/var/www$ sudo php composer.phar update
Loading composer repositories with package information                                                                                                                                                         Updating dependencies (including require-dev)         
  - Removing thujohn/twitter (2.0.4)
  - Installing thujohn/twitter (dev-master 7a92118)
    Downloading: 100%         

Writing lock file
Generating autoload files
> php artisan clear-compiled
> php artisan optimize
Generating optimized class loader

I just needed to specify the "master" branch name as "dev-master".