Added open(…).read() and open(…).readlines(). Work around bug caused by Foundation not being available by caller.
Added open(…).read() and open(…).readlines(). Work around bug caused by Foundation not being available by caller.

Work around the following by exporting Foundation (@exported import Foundation):

Undefined symbols for architecture x86_64:
  "__TF10Foundation22_convertNSArrayToArrayU__FCSo7NSArrayGSaQ__", referenced from:
      _top_level_code in Pythonic-test-272a9b.o

scottsievert/Pythonic.swift,practicalswift/Pythonic.swift