Adds a KATHERINE_MET_SCYLLA flag.

This flag is 1 (or any value n for which !!n == true) if Katherine was met via Scylla.
Fixes another mention of Scylla.
Merge branch 'flag-KATHERINE_MET_SCYLLA' of https://github.com/zadenikt/Corruption-of-Champions into zadenikt-flag-KATHERINE_MET_SCYLLA

Conflicts:
	classes/classes/GlobalFlags/kFLAGS.as
Merge branch 'zadenikt-flag-KATHERINE_MET_SCYLLA'