Adjusted files to handle new ID type

The old ID type for Wods, Strength, and Post WoDs were INT(11) in the
DB. Well, that works for up to box id #99, any box that has an id of
over 100 will cause the id to max out and thus not represent the correct
wod/strength/postwod id. I changed the ID type to VARCHAR(25) and
changed the ID scheme to the following: <boxid>_<dateofwod>, for
example: 1_20140512