Add hook for changing features to ignore

Hello, thanks for this patch - I agree that this is a great enhancement for this project. I'll take some time to review this in the next week and if all is good, I'll merge it in.

Thanks!

This looks pretty good, but I have one minor thing I'd like to change. With this patch, I'm able to add entries like so:

/**
 * Implements hook_features_hide().
 */
function MYMODULE_features_hide() {
  return 'MYMODULE_feature';
}

This is great, but I think it'd also be useful to allow developers to remove items from the list as well. To do that, I think we'd need to switch from module_invoke_all() to drupal_alter() to allow something like this:

/**
 * Implements hook_features_hide().
 */
function MYMODULE_features_hide(&$hide_list) {
  // Remove an item.
  unset($hide_list['MYMODULE_showfeature']);
  // Add an item.
  $hide_list['MYMODULE_hidefeature'] = 'MYMODULE_hidefeature';
}

That's the basic gist, the structure of the $hide_list might need working out a bit though.

Hi John,

Thanks again for for this contribution! I've gone ahead and committed your additions, the 7.x-1.x dev release and 7.x-1.1 (which should be up shortly) contain these.

Best,
Matt