Add new script run_phonons for Phonon calculations.
 Add doc in the new scripts.
 Replace TaskManager.from_file with TaskManager.from_user_config
 Modify syntax in abirun.py (rapidfire dirname --> dirname rapidfire)
 New option "inspect" for inspecting the calculation of the Task.
 run_sic_relax was not working.
 Make AbipyTest inherit from PymatgenTest (Don't repeat yourself)
 Move serialize_with_pickle to pymatgen.
 Enabling travis builds
 Try to fix problem with scipy build.
 netcdf libs
 Let's see if this solves the problem with netcdf4
 Another try.
 Code cleanup
 Just to trigger travis build
 Working on the YAML parser.
 Modify travis.yml following Shyue's suggestion
 New try with travis
 Preliminary implementation of PyFlowsScheduler.
 Move phononflowchart to pymatgen