work in progress
eta_qexp (proper code)
add doc
add theta function
move chebyshev t/u, swinnerton-dyer, cyclotomic to fmpz_poly_special
simplify chebyshev_t/u
make fmpz_special and fmpq_special modules
move multiplicative functions to fmpz_special module
add functions for evaluating chebyshev polynomials at integers
don't assume that n_sqrtmod accepts unreduced input
fix out of bounds error
Merge pull request #14 from curtisbright/patch-1

fix out of bounds error
better code for computing harmonic numbers; create fmpq functions
remove obsolete macros in mpn_extras.h
remove pi_chudnovsky (obsoleted by Arb)
add fmpz_poly_cos_minpoly (improved algorithm!)
move and rename things
doc correction
cleanup
merge