- passed previous class attributes to instances attributes
- better handling of constructor arguments
- better coverage on unittets (including encoding)
- updated documentation with new changes

utils.signal: made send_catch_log function more robust (by using pydispatch.robust.sendRobust) and added unittests

--HG--
rename : docs/topics/index.rst => docs/index.rst

--HG--
rename : docs/misc/api-stability.rst => docs/api-stability.rst