Fix bug about missing Interval field (closes #1463996).
Implement Field and Widget dedicated to the yams entity 'Interval':
- TimeIntervalField
- IntervalTimeWidget
Allow to set an integer with a character as a period of time '20s', '48h' or
'3d' for instance (turn into seconds).
Pierre-Yves David <pierre-yves.david@logilab.fr> [Wed, 15 Feb 2012 18:12:38 +0100] rev 8247
[cubicweb-ctl] i18ncube return 2 (failed command) on failure (closes #2192336)
i18ncube command previously returned 0 even on failure. Bisect i18n breakage was
hard.