respect order of family tags

[tbates]

hi,
if a user includes multiple family tags, they are alphabetized.

It would be nice to respect the user's ordering, as this increases control over the display.
Currently
@family Most used functions you NEED
@family Common helpers you should read
@family Any obscure things, of use to very few

Becomes the below. It would be better to insert these in the order given, not sorted:

Any obscure things, of use to very few: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Common functions you should learn plot, c, subset
Most used functions you NEED t.test, lm