Modular exponentiation in polynomials

[Shashwat Singh]

This is with reference to this ticket (and comment): https://trac.sagemath.org/ticket/15867#comment:17

I am going to begin work on a modular exponentiation function that is more efficient.

But before I begin, I had a few doubts:

- the polynomials are dealt by one of two C libraries: FLINT and NTL, so a general modular exponentiation function on polynomials must be written in python?
- Also, I am having trouble figuring where would I place the code for  that, and understanding the organization of the polynomials code in general. If I could be pointed to a developer documentation on the same it will be very helpful

If this is not the right place to put this ticket, please let me know.