version 0.4.0

Update the version in CMakeLists.txt to 0.3.5

Merge pull request google#1 from ukai/release_0.3.4

glog: release 0.3.4

release 0.3.3

release 0.3.2

release 0.3.1

release 0.3.0

release 0.2.1

release 0.2

release 0.1.2