0.4.0

• Addition of several new endpoints thanks to @blx and @pmallory
• Piazza -> PiazzaRPC; Piazza is now an abstraction on top of it
  • Piazza has several additional methods to PiazzaRPC which are not tied directly to one of Piazza's RPC endpoints but instead use them in combination (as was the whole point of the additional abstraction =D )
• Added Network; Piazza instances are not tied to a specific network, instead can create Networks after authentication
• get_user_profile is a method of Piazza as it is not tied to a specific network