Update: IKI Improvements and some cleanups.

Update: IKI Improvements and some cleanups.

The _di_X_t_ where "X" is something like f_fss_object, is missing the leading "f_" in several cases.

Make the *_increase() step variable an f_array_length_t.
Rather than trying to optimize, just guarantee whatever step size is desired is available.

Move the iki_read programs practice of defining an iki_data_t structure into the level_0 iki project.
This then allows simplifying the arguments passed to the iki read functions.