replace use of deprecated file
[touch: 144]
use dbDelta correctly
change primary key definition to unique key (term_id is not auto-incremented and is actually a foreign key to the term table.
[touch: 144]
revert previous commit.  gonna keep the primary key but fixing an error with "duplicate key" on activation.
[touch: 144]
make sure table name for orgSeriesIcons is changed to lowercase (dbDelta() takes care of that for us)
[touch: 144]
bump version in dev to 2.4.6-dev
[touch: 144]