More reconstruct dir struct to modulized boost's one.

Signed-off-by: Kohei Takahashi <flast@flast.jp>
More compliant original Range's documentation style

  * algorithm_ext/fused_for_each.qbk
  * ranges/directory_range.qbk
  * ranges/iteration.qbk
  * ranges/recursive_directory_range.qbk
  * ranges/single.qbk

Signed-off-by: Kohei Takahashi <flast@flast.jp>
Fix compile error

Signed-off-by: Kohei Takahashi <flast@flast.jp>
Use combined_range directly

Signed-off-by: Kohei Takahashi <flast@flast.jp>
Merge pull request #16 from Flast/pr/zip_range

Use combined_range instead of zip_range
Merge upstream branch 'faithandbrave/master'
Merge branch 'oventoboost/master' into oven

Signed-off-by: Kohei Takahashi <flast@flast.jp>