bbcode 5.x-1.1

New Features in BBCode 5.x-1.1:

- add Japanese translation by Takafumi
- add support for [strong] and [em] tags (same as [b] and [i])
- add [index] tag to generate a page index
- improved table tags (ability to specify row color. E.g. [row color=red]...[/row])

Bug fixes for BBCode 5.x-1.1:

- fix include_once without full path by John Morahan
- fix untranslatable string by Takafumi
- tiny fix to the help tips by ac