Merge pull request #76 from yeshunping/master

port stl_util.h
Adjust stl_util and add tests
Add cityhash
Merge pull request #77 from chen3feng/develop

Develop
Cpplint all
Merge pull request #80 from chen3feng/develop

Cpplint all
Merge branch 'master' of https://github.com/yeshunping/toft into yeshunping-master
Fix Varint and add SetupBinaryVersion
Fix for cpplint
Merge pull request #86 from chen3feng/develop

Develop
cpplint
Merge pull request #87 from chen3feng/develop

cpplint