Added hook_taxonomy_term_view() and standardized the process for displaying taxonomy terms

Drupal 7.17 revamped the process by which taxonomy terms are prepared for display and rendered, to make it consistent with the display of other entities.

Added functions:
taxonomy_term_show($term)
taxonomy_term_view_multiple($terms, $view_mode = 'teaser', $weight = 0, $langcode = NULL)
taxonomy_term_build_content($term, $view_mode = 'full', $langcode = NULL)

Added hooks:
hook_taxonomy_term_view($term, $view_mode, $langcode) - triggered during taxonomy_term_view() and before hook_entity_view() is triggered.

API change:
hook_entity_view() is now triggered during a taxonomy term page load.

Example:

/**
 * Implements hook_taxonomy_term_view().
 *
 * Add a new value to the taxonomy term page output.
 */
function mymodule_taxonomy_term_view($term, $view_mode, $langcode) {
  $term->content['my_additional_field'] = array(
    '#markup' => t('Surprise!'),
    '#weight' => 10,
    '#theme' => 'mymodule_my_additional_field',
  );
}