Argument aliasing check

[tmmsartor]

As pointed out in #27 aliasing of routines arguments can lead to unexpected and unwanted behaviors.
To mitigate this problem I propose two incremental solutions:

• Specify this requirement more clearly in the documentation
• Add a compilation flag with which one can enable some kind of checks for argument aliasing on all routines that do not allow them.

[giaf]

Yep this was exactly the idea of the run_time_checks, but so far it has been implemented only in very few routines.