Missing SORTKEY produces a warning in alignment, stat, check

In preparation for PCGen 6.7 where SORTKEY will be required on stat, check, alignment, they should produce a warning in 6.5/6.6 if no SORTKEY is present.

Note that SORTKEY used in 6.5/6.6 MUST match the order in which they appear in the file (redundant information necessary to make things break if not done properly across versions)