Fix fq_mat documentation.
Use generic compose_mod_preinv vs. compose_mod_brent_kung_preinv
Run indent on fq/*
Run indent on fq_vec_templates/
Run indent on fq_vec_templates/test/*
Run indent on fq_mat_templates/*
Run indent on fq_poly/*
Renable fq_poly_divrem_divconquer.
Add code for profiling fq_poly_mulmod vs. fq_poly_mulmod_preinv.