Made profession gender differences better

There are no gender-restricted professions, and professions are allowed
to have different names for male and female characters. Also, for professions
with gender-specific names, a message appears in the description area allowing
the player to press TAB to switch gender quickly from the profession menu.

Also, as a result of the different profession names, alphabetical sorting
doesn't work (unless we want to sort the list of professions every time, or
keep two separate lists for male and female sorted professions), so it was
changed to sort by point cost (though the default is still always at the top).