re #7208 Add getWeight and getWeightErrors to eventlist

This is also accessible via Python
el = ws.getEventList(0)
weightList = el.getWeights()

print len(weightList) # should contain the same number of weights as events in the event list
print weightList[0] #first value
re #7208 wrapped arrays in numpy and fixed getTofs

GetTofs fails due a a line deleted by mistake (I'm suprised it compiled).
Wrapped getweight, getweighterrors and getTofs in numpy arrays
Added py unit test for getTofs
Merge remote branch 'origin/feature/7208_event_weights'