Queued artifacts

[tcezard]

Properly parse the queued artifacts to retrieve the artifacts and the timed they were queued.
queued_artifacts returns alist of tuple such as:

queued_artifacts =  [
    (Artifact(), datetime(...), (Container(), 'H11')),
    (Artifact(), datetime(...), (Container(), 'H12')), 
]

In python 3 the datetime object will have a time zone where it will be ignored in python 2.7
closes #18

[coveralls]

Coverage decreased (-0.2%) to 76.431% when pulling 6a228c1 on queued_artifacts into 82c1b93 on master.

[mwhamgenomics]

Shadows input built-in

[coveralls]

Coverage increased (+0.4%) to 77.044% when pulling bed8bb9 on queued_artifacts into 82c1b93 on master.

[coveralls]

Coverage increased (+0.4%) to 77.044% when pulling bed8bb9 on queued_artifacts into 82c1b93 on master.

[Rubyj]

Any idea when this feature will be rolled out in an official version? (0.4.2 or whatever the next will be)

[tcezard]

released now in 0.4.2