Prototype for installing/downloading packages
Fix checking version identifier
Use symfony/process to monitor composer output
Use random directory in system temp dir
Check for composer error output and fail if present
Indent composer output
Move execution logic
Improve error reporting
Add timing info
Improve console logging output
Use either local composer.phar or system-wide composer installation
Add CHANGELOG
Merge pull request #7 from clue/add-install

Add feature to download/install given package from packagist