Moving to mpi4py version of process tests
:lipstick: line size
Adding another test for processes

Adding explicit failure mode in test functional
All tests for process are now ok
Remove editor backup files
Adding ipython tests
Nose testname fully qualified if installing
Removed some stuff that was commented out
Reinstated tests that run vasp

Don't know if it works cos I don't have vasp...
Extension loads as %load_ext pylada
:bug: Could not find pifunctional executable
Can load extension as load_ext pylada: modified the docs
Adding `make documentation`