public static function installPackage($packageName, $constraint = 'dev-master')
	{
		if (self::_requirePackage($packageName, $constraint))
		{
			self::_resetComposer();
			return self::_updatePackage($packageName);
		}
		return false;
	}
public static function installPackage($packageName, $constraint = 'dev-master')
	{
		if (self::_requirePackage($packageName, $constraint))
		{
			self::_resetComposer();
			return self::_updatePackage($packageName);
		}
		return false;
	}
public static function installPackage ( $ packageName , $ constraint = 'dev-master' ) { if ( self :: _requirePackage ( $ packageName , $ constraint ) ) { self :: _resetComposer ( ) ; return self :: _updatePackage ( $ packageName ) ; } return false ; }
Install a package as a specific version

@param		string	$packageName	Name of the package to install
@param		string	$constraint		Version constraint string - see https://getcomposer.org/doc/articles/versions.md
@return	boolean	Indicates success or frailure
Install a package as a specific version