Update: Add support for indexer_arguments, update documentation, and fix printing...

Update: Add support for indexer_arguments, update documentation, and fix printing bugs.

This is a step towards removing hardcoded defaults that I had initially added just to save time.
The indexer now has an indexer_arguments that will expect the arguments, such as "rcs".
Update the documentation, documenting this behavior, fix problems in the documentation, and do some cleanup of the documentation.

There are some places where "linker" is still used.
Replace this usage with "indexer".

Fix some cases with printing mistakes.
These mistakes are likely regressions resulting from the mass refactor to the fl_print_format() and fll_print_format().

I've noticed that there are some problems with the settings in the fakefile.
The custom settings, such as "compiler", "indexer", etc.., are being overwritten by the build settings.

It may also be a good idea to provide another iki parameter to expose some of these settings.