Add a bit of whitespace to the readme file.
Remove the generation date/time from the documentation.

This will make comparing doxygen output between runs a lot easier.
Further documentation for y_browseremulation.c
Document y_browseremulation.c
Add the browser list chance total to y_choose_browser_from_list()
Improve return codes for various browser functions and document them.
document the new browser_list_chance_total parameter to y_choose_browser_from_list()