Progress: Continue string and convert changes, fixing bugs.

Progress: Continue string and convert changes, fixing bugs.

Convert the fake program.

Move the "%n" to "%in" to be consistent with how "%un" is used.

Change print string safely to ignore NULL rather than print the NULL character symbol.
This is done to be consistent with existing FLL design.
I realized printing the symbol is a problem when I test the fake build verbose setting.

Add warning output to fake and control programs.

Add -O2 optimization by default.

Provide standard conversion base data.