Export topology in a much more efficient way.
Add a new simcall that modifies the rate of the first smx_action_t on smx_rdv_t
Bounded receive
Merge branch 'master' of git+ssh://scm.gforge.inria.fr//gitroot/simgrid/simgrid
Fix double free error.

Error reported by Borja Bergua, and patch inspired by Martin
Quinson's proposal.
Fix the parallel execution for the bittorrent example.

The problem was that RngStream creation is not thread safe.  Furthermore,
each created RngStream is dependent of the previously created RngStreams.

The problem is circumvented by creating the RngStreams before the launch
of the application.  Each host has its own stream, that can be retrieved
through MSG_host_get_data().
Tests msg-bittorrent-*-parallel are not broken anymore.
Update .gitgnore.

Match any build directory named "build_*", and add etags' tag table.
Add missing declaration.

Plus whitespace cleanup.
Kill unused variable.
Reindent.
Initialize variable, and make gcc happy.