OsSemaphore is implemented in a portable way with C++11 threads.
This should allow much more threads to be created at the same time,
allowing Mac and Java users to simulate many more actors.
+ - Drop several unused xbt_os_thread_t functions:
+ - xbt_os_thread_get_extra_data()
+ - xbt_os_thread_set_extra_data()
+ - xbt_os_thread_self()
+ - xbt_os_thread_self_name()
+ - Drop xbt_ex_display(), use simgrid::xbt::log_exception() instead.
Fixed bugs:
- #261: Document the parameters of parallel execution's constructor
