Improved read/write performance

- treat binary-data directly
- read from fd up to 64kB at a time
Merge pull request #156 from ichizok/improve-readwrite

Improve read/write performance
Revert "Improve read/write performance"
Merge pull request #157 from Shougo/revert-156-improve-readwrite

Revert "Improve read/write performance"
Change default timeout
[WIP] Improved read performance
[WIP] Improved R/W

- handling (pseudo-)binary directly
[WIP] Improved proc_w32
[WIP] adjust read timeout
[WIP] fixed s:read process
[WIP] Improved s:read_line(s)
[WIP] Improved s:read_line(s)
[WIP] slightly changed comment
[WIP] Fixed proc_w32 pipe/socket I/O