correctly rounded floating-point conversions
in new package strconv.

move atoi etc to strconv too.

update fmt, etc to use strconv.

R=r
DELTA=2232  (1691 added, 424 deleted, 117 changed)
OCL=19286
CL=19380
24 files changed
tree: aeb58cc993873dadfe1a2adbc63521879b2dd66a
  1. doc/
  2. include/
  3. lib/
  4. pkg/
  5. src/
  6. test/
  7. usr/