Added BindOnEquip to the item_db documentation and templates

- Special thanks to ossi0110, kyeme
- Fixes bugreport:7821
  http://hercules.ws/board/tracker/issue-7821-missing-item-dbconf-columne/

Signed-off-by: Haru <haru@dotalux.com>
Added support for case-insensitive jobmasks to the itemdb converter

- Fixes parsing failures due to lower- (or mixed-) case job masks.
- Special thanks to ossi0110 for the report.

Signed-off-by: Haru <haru@dotalux.com>