Added ID suggestions for hook_update_N().

When inserting a hook_update_N() with `drupal-insert-hook` an we will
suggest an ID the hook implementation based on previous update hooks and
Drupal and module major versions.
Added drupal-mode to dired buffers.
Removed api.drupalize.me.

The Drupalize.Me API site is retired.

See https://drupalize.me/api-site.
Run flycheck phpcs checker in-place, so info file rules work properly.
Only use our phpcs special checker on non PHP-files.
Merge pull request #52 from arnested/flycheck-updates

Flycheck updates
Fixed URL of Drupalcontrib.org API.
Properly concat phpcs option in newer flycheck.