- Improved error catch behavior.
- Fixed vimproc#write().

Don't ignore case
- Fixed #80 README.
Merge pull request #78 from anekos/fix/vimproc-write-dont-ignore-case

- Fixed vimproc#write().
Fixed vimproc#write(). - broken mode argument
Merge pull request #81 from anekos/fix/broken-write-mode-argument

Fixed vimproc#write(). - broken mode argument
- Improved Makefiles.
- Fixed read_lines().
Use clang to build vimproc in Mac

I changed to use clang to build vimproc in Mac because llvm-gcc
seems to be removed in Marvericks.

I ran tests and confirmed that all tests are passed except for
test-fopen, which is not passed even if llvm-gcc is used.
Additionally, I use some plugins which uses vimproc with vimproc built
with clang.  It seems to work well.
Merge pull request #85 from rhysd/mac/clang

Use clang to build vimproc in Mac
Fix vimproc#filepath#which()
Fix a tag
Merge pull request #88 from rhysd/fix/doc

Fix a tag
Support process group(experimental)
Disable kill process group feature
Added for pgid feature
No set sid
Fix #89 resource leak
Improve kill behavior
Delete setpgid() in pty