This code was part of Dolphin's relicensing from v2 to v2+ a while back,
we just never updated these copyright headers. I double-checked that
segher gave us permission to relicense this code to v2+ on 2015-05-16.

- Move all of the ec functions into the Common::ec namespace.

- Give the public functions better names and some usage information.

- Move all of the "elt" related functions into an "elt" class including
  all of the arithmetic operations, so that the logic becomes clearer
  and feels less like assembly.

  This also makes it much more obvious what the parameters are, instead
  of only using unsigned char* (which doesn't tell anything about what
  the pointer is used for or the size).

- Similarly, add a new "Point" class and move point functions there.
  Overload the arithmetic operators to make calculations easier to read

IOS unpersonalises device-specific ("personalised") tickets prior to
storing them on the NAND.