add pmult.c
remove a.out
ignore *.out *.h.gch
add 3_peval.c
add README
add a new type of poly structure
finish the new type of poly struct
add sparse_matrix
fix a bug in transpose.c
Revert "fix a bug in transpose.c"

This reverts commit 0158f216180da5897d5fea7cf953ca46ffddd25e.
try revert
make mac and linux the same
rewrite the fast_mmult
adjust the dir struct and name
remove sparse_matrix