Improve Results.py

[amzhao16]

Previously: the results allowed for voltages (list of voltages), losses (dictionary of active power loss, reactive power loss) and totalpower (just kept active power, reactive power in an unreadable vector).

In this PR:

• fixed totalpower to more clearly print out what is active power vs reactive power
• no longer case-sensitive or space-sensitive
• Users can also query the parts of losses or totalpower separately if they choose to.
• i.e. if they just care about real power and losses they can have their query be ["RealPower", "RealLoss"], instead of having to query losses and totalpower and manually parse the results for the "real" parts

[sarahmish]

lgtm! @amzhao16