fix destructors of storage related classes
fix pagination
fix typo in perfstore
typo: trailing spaces
trailing spaces
show traceback when crashes, does not crash for missing import anymore
Merge branch 'bugfixes'

Conflicts:
	sources/pyperfstore2/pyperfstore2/manager.py
fix: undefined date in cgrid_state
timestamp properly displayed again
avoid undefined values on renderer
fixed date renderer behavior for all calls
fix 1970 date in minichart
fix spark line redraw
fix, check timestamp value in cspark redraw
french date translations in renderer
removed useless comment
minichart refresh partial resolution -> missing live reporting case
fix nodejs install (sometimes nodejs-libs was installed before, and thus failing
add ubuntu dependancies
fix minichart refresh