Ported to libc++.
Implemented bind() to port to libc++.
Modified unordered.h not to include <tr1/*.h> when using libc++.
Merge pull request #8 from gwtnb/libc++

Ported to libc++.
Revert "Merge pull request #8 from gwtnb/libc++"

This reverts commit 99c40d46a98db25ab49708ebc000655f8a831cc7, reversing
changes made to 01ba9598f14e9a679d31f343b003b36153df55e6.

Commit 99c40d46a98db25ab49708ebc000655f8a831cc7 breaks Jubatus build.
Stop using -O4.

-O4 is undocumented in gcc, and ignored by intel compiler.
Remove unused m4 file.
Add -pthread.
Port to Mavericks.
Merge pull request #13 from gwtnb/stop-using-o4

Stop using -O4.
Fix types for struct timespec.
Fix types for struct timespec.
Merge pull request #15 from gwtnb/mavericks

Port to Mavericks.
Merge pull request #14 from gwtnb/pthread

Add -pthread.