[docs] Misspellings caught by ispell
[docs] recommend implicit return for setting files
[docs] more guidelines to adding methods to the setting
[docs] thinko in guide_to_setting.pod
Some refinements to guide_to_setting.pod .
add links to guide_to_setting.pod.
Also mention Makefile changes needed when adding a new file. kjwcode++ for
[docs] add an =encoding directive for kjwcode++
added "guide to setting" document