Add options to specify autoloader script

[Zekfad]

We have custom class loader (which uses composer with a few additions).

Currently trying to use {# @var variable type #} causes errors in language server log and no suggestions. Also include path is default one. (I'm using workspace file in home directory and project folder ~/www-dev)

[Error - 7:04:36 AM] Command failed: php /home/zekfad/.vscode-server/extensions/moetelo.twiggy-0.17.0/dist/phpUtils/reflectType.php /home/zekfad/www-dev 'string'
PHP Warning:  require_once(/home/zekfad/www-dev): Failed to open stream: No such file or directory in /home/zekfad/.vscode-server/extensions/moetelo.twiggy-0.17.0/dist/phpUtils/reflectType.php on line 18
PHP Fatal error:  Uncaught Error: Failed opening required '' (include_path='.:/usr/share/php') in /home/zekfad/.vscode-server/extensions/moetelo.twiggy-0.17.0/dist/phpUtils/reflectType.php:18
Stack trace:
#0 {main}
  thrown in /home/zekfad/.vscode-server/extensions/moetelo.twiggy-0.17.0/dist/phpUtils/reflectType.php on line 18

Also, as you can see from error above it can't process primitive types like int, string, bool etc.

It would be great to have a way to point autoloader script (we have different loaders per environment).

[Zekfad]

I'll work on this and submit results after #59