Maurizio Drocco

http://mariobadr.com/creating-a-header-only-library-with-cmake.html

- test_stopstartthreads.cpp

to be dropped everywhere

https://docs.google.com/spreadsheets/d/1LSUsMWVvI9jQLmT4jCr8o8DUJ1AnuEM7WkCCAAFN6dw/edit?usp=sharing A matrix with the status of tests build/run. @massimotorquati @aldinuc

e.g. `InsertAt()` crashes

- [x] distributed-sequential on array: >100x slowdown - [ ] distributed-sequential on set: 3x slowdown