Allow configuration of converters

[thboileau]

Initial ticket : http://restlet.tigris.org/issues/show_bug.cgi?id=1168

workload: 1d + 3d update documentation

[thboileau]

See also this thread from Bjorn Roche:

http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2937534

[jlouvel]

Set milestone to 2.3 M2 as we refactor the Restlet API.