Merge pull request #50 from socantre/master

fix affect/effect
rewrite section Iterator Operations are Primitive
Merge branch 'master' of github.com:ericniebler/range-v3
safer sized_range
feedback on D4128
Some editorial changes.

Just some things I noticed as I was reading.  More to come later.
range and sized_range clean-up
iter_swap
Continued editorial changes.
Final editorial changes before merge.
Whoops; typo.
Merge branch 'master' into patch-1
Fixed table of contents (I think)
Merge pull request #52 from Bekenn/patch-1

Editorial changes to D4128
partial_sort and tests
Merge branch 'master' of github.com:ericniebler/range-v3
sort and tests
partial_sort_copy and tests
stable_sort and tests
use counted raw-memory iterators to clean up buffer handling and improve exception safety