Refactor Transformation Primitives

[sarahmish]

Transformation primitives

• Float2Scalar
  • turn floats into scalar integers.
  • this includes rescaling and taking n decimal points.
• Scalar2Float
  • turns scalars into floats.
  • reverse operation of Float2Scalar
• format_as_string
  • convert windows of integers to windows of string
• format_as_integer
  • convert windows of strings into windows of integer