* Kill the xbt_peer_t data type: it's useless without GRAS.
* Kill rm_cb feature of config sets: it was never useful.
* Kill graphxml parsing feature. It was not used.
+ * Kill the deprecated code protected by XBT_USE_DEPRECATED
* New functions:
- xbt_dynar_sort_strings(), when the content is char*
- xbt_str_parse_int / xbt_str_parse_double, wrapping strtol/strtod