Add a test for extra flags.
Change the log format and output log files.
Change tmpdir behaviors.
Fix log systems.
Fix a build error.
Add an option to change default values using environment variables.
Add flags: alsologtostderr and logtostderr.
Make imosh more verbose.
Make tests pass even if IMOS_FLAGS_(also|)logtostderr is enabled.
Add a missing file.
Merge pull request #6 from imos/experimental

Merge.