Add a ManyToManyField to the skill model relating to
'self' so we can create a list of similar skills for
each individual skill. This is similar to the bottom
parts of GuildWiki skill pages.
This would normally be trivial, but since we already
have data in the skills table, we'll need to manually
add a column of whatever type used in M2M relations. I
assume it's some kind of integer. The best way to check
this out is to delete your skills table, then do a
syncdb and look at the structure that is created.