bin/openquake:

Rewrote the --lhc and --lrc output formatting. The timestamp of the latest job
is also included.
bin/openquake:

Added a docstring to _print_calcs_summary.
bin/openquake:

Removed some unnecessary print statements.
bin/openquake:

Cleaned up the --lho and --lro output as well, to be consistent with --lhc and
--lrc.
bin/openquake:

Added some missing docstrings.
bin/openquake:

Cleaned up imports and fixed some pep8 warnings.
Merge pull request #1041 from larsbutler/add-timestamps-to-list-output

Add timestamps to calculation summary output

[r=micheles] [f=1129271]