esp_nwchem
 Make workflow pickleable
 Cosmetic changes
Merge remote-tracking branch 'mpmaster/master'
 Save UnitError as class attribute of Unit, FloatWithUnit, ArrayWithUnit
 Refactoring task.status
add test for nwchemio and fixed bugs
fixed bug in theory_spec
corrected keyword dielectric
added another template for ESP and removed RESP
 Preparing refactoring of EventParser
Merge remote-tracking branch 'mpmaster/master'
 New method to recheck the status of the tasks
Merge remote-tracking branch 'mpmaster/master'
Update doc examples.
 Better treatment of possible errors raised by ABINIT
Merge remote-tracking branch 'mpmaster/master'
Cleanup of units and constants.
Cleanup units and physical constants (with refactoring). Added more examples.
Fix error in doc.