Simplified decode_signal()
Merge pull request #160 from Shougo/simplify-decode_signal

Simplify decode_signal()
[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
[WIP] Improved s:read_line(s)
[WIP] Improved read timeout
[WIP] Improved read timeout (w32)
[WIP] Comment out unused functions
[WIP] Fixed timeout process (w32)
[WIP] Fixed timeout (w32)
[WIP] Fixed timeout
[WIP] Reverted timeout process
[WIP] Improved s:system() performance