composer/composer — pull request #2070 by odracci (2013-07-08 19:36:13+00:00)
Title: Added variables in composer.json

Variables can be referenced in the composer.json.

An example:
```json
{
"require": {
"symfony/console": "%symfony.version%",
"symfony/process": "%symfony.version%",
"symfony/yaml": "%symfony.version%",
"symfony/filesystem": "%symfony.version%"
},
"variables": {
"symfony.version": "v2.3.1"
}
}
```