Options have been added to:
  - enable warnings
  - treat warnings as errors
  - enable compile-time optimizations
  - disable run-time assertions

gcc/clang versions are checked to ensure they support c++11.
The C++11 flag is set manually to limit CMake version need.
The CMake version needed is now 2.8.11 (target_compile_definitions).

The corresponding output file would be OUT_consumed_energy.csv.
This file is a time series.

Previously, this function returned whether the timeout has been reached.
It now returns whether the socket is opened at the end of the function.

Many instances can be executed thanks to Execo.
Instances already done in the past will not be recomputed :).

Variables can now be either:
  - simple. one value, accessed via ${VAR}
  - lists. accessed via @n{VAR}, where n is
    the element to access.

Remote execution is implemented but has not been tested yet.

TODO: pre and post commands of the exec1 instance
TODO: pre and post commands of the execN instances
TODO: hide error messages in the execN script?

Launching batsim+scheduler works
Outputting files in the given output_directory works
  This can be given via CL-argument or in the yaml file
Executing batsim+scheduler from a given directory works
  This can be given via CL-argument or in the yaml file

Executing pre or post commands is not implemented yet