lbayle/codev — pull request #204 by NSV (2012-07-17 23:24:21+00:00)
Title: PERF Add a new sort objet method by using already existing method usort

usort() need a comparator, so I created a Comparable interface
If a class need to be sorted, it must implement Comparable interface with a simple method :
compare() return 1, -1 or 1
sort by asc