Jian He authored Jan 17, 2014 and David Stoline committed Jan 17, 2014

Issue #2167407 by jian he: Need give a chance for other modules to change the menu_link before save.

Issue #1902192 by jseun, hles: Fix for empty terms being hidden even if the hide empty terms option is set to false.

Issue #[1895882] by hles: All links are hidden if the hide_term option isn't set, bug introduced by commit 429b67db, a test was added.

taxonomy_menu_menu_link_prepare is now much more readable as it uses a new function to load or initialize a menu item (taxonomy_menu_menu_link_load)

Added a helper module for tests that registers paths that could be used in Taxonomy Menu but are not in a default Drupal installation.

- Fixed buggy behavior of nodes count
- Adjusted Hide empty term test to reflect these changes
- Improved description of admin options

Added #states to HTML title attribute option for better admin experience and commented vocabulary description option because it's not used atm

- Introduced a helper function to check a path exists in {menu_router}

Added a hook so other modules and submodules can add their own settings to the taxonomy vocabulary form and be processed altogether. Changed options word in settings.

Prevent notification message saying that the taxonomy menu was not updated when a full rebuild has been selected, even if the options have not changed.

Added a test for 'display empty terms' option and fixed wrong behavior of the function detecting nodes attached to a term.