Greatly increased argument help
* All tools now have a longer description in the tool-specific help page. * Arguments are now presented in groups and the order is the same across tools. Furthermore: * Fixed bug that rendered BGHomStats and BGEstimate with the -H option useless. * The report of Allelefinder and BGEstimate is now written to sys.stderr by default. This means the report is now always generated (but it may be sent directly to /dev/null explicitly by the user). The big plus is that the progress of the tools is visible in the terminal when the tools are run by hand.