Bugfix & Improvements on mc-dl and mc-versions methods

When using error_reporting E_ALL we got some notices when passing a bad url to mc-* methods like:
>martins@martins-ux:/var/www/mageclean$ wiz mc-versions 
>Please supply a Magento Connect 1.0 or 2.0 key.PHP Notice:  Undefined offset: 0 in /var/www/modulos/Wiz/app/plugins/MC.php on line 72
>PHP Stack trace:
>PHP   1. {main}() /var/www/modulos/Wiz/wiz.php:0
>PHP   2. Wiz->run() /var/www/modulos/Wiz/wiz.php:24
>PHP   3. Wiz_Plugin_MC->versionsAction() /var/www/modulos/Wiz/app/Wiz.php:379
>
>
>Notice: Undefined offset: 0 in /var/www/modulos/Wiz/app/plugins/MC.php on line 72
>
>Call Stack:
>    0.0002     226080   1. {main}() /var/www/modulos/Wiz/wiz.php:0
>    0.0081    1115088   2. Wiz->run() /var/www/modulos/Wiz/wiz.php:24
>    0.0081    1115696   3. Wiz_Plugin_MC->versionsAction() /var/www/modulos/Wiz/app/Wiz.php:379
I fixed it with adding a throw exception instead of a simple echo.


And...
When i tried to use mc-dl or mc-versions on Ubuntu, the $options array turns into 2 items array:
>martins@martins-ux:/var/www/strar$ wiz mc-dl http://connect20.magentocommerce.com/community/Inchoo_FeaturedProducts
>array(2) {
>  [0] =>
>  string(4) "http"
>  [1] =>
>  string(65) "//connect20.magentocommerce.com/community/Inchoo_FeaturedProducts"
>}

I fixed it by adding _getFixedOptions() private method. It's far from perfection, but now it works without saying *Only support MC 2.0 keys at this time.  Sorry!*