Generate sosa numbers

[GoogleCodeExporter]

Quite some queries depend on sosa numbers. 

Sosa numbers are more powerful than just ancestor relationships. Sorting in a 
numerical way gives the individuals ordered by generation. Sorting as a left 
aligned binary string result in a tree order, and indenting by the length of 
the string result in a tree. Person with multiple numbers have offspring that 
married within the family.

Currently the reports rely on third party gedcom editor for the sosa numbers. A 
parameter with the ID of the proband should trigger the select command to add 
sosa numbers before executing the query.

Original issue reported on code.google.com by jo3....@gmail.com on 3 Mar 2013 at 4:10