Swith to coreos/go-log from ccding/go-logging

bump(github.com/coreos/go-etcd): 57864cf81c66b8605816fafab3ab142e1c5f5b29
bump(github.com/coreos/go-log/log):
bump(github.com/coreos/go-systemd): 52f153170a52158deffce83502a9b6aed3744802
Switch from golang log to coreos/go-log
Fix nil logger in inits

Move the logger initialization out of init in util.go and into the
variable initializer.  This ensures that it will be run before any of
the other init functions.
Merge upstream
Merge pull request #192 from xiangli-cmu/master

fix timeout
Merge pull request #187 from sakana/master

Switch to coreos/go-log
Typos
Merge pull request #194 from mburns/patch-1

Clarify FAQ language
README: add russellhaering/txectd
feat(README): add contributing section and file

Direct people to the contributing file and README. Trying to solve the
problem of people emailing developers directly.
Merge pull request #197 from philips/add-contributing

feat(README): add contributing section and file
Update CONTRIBUTING.md
fix(CONTRIBUTING): try and fix # links in markdown
adopt documentation to implementation

as requesting the root path of etcd leads to a 404, whereas a request
to /version leads to the etcd version, update the documentation.
Merge pull request #199 from zined/update_documentation

adopt documentation to implementation
Update README.md

Minor typo fix (dead -> died).
Merge pull request #201 from rca/master

Update README.md
chore(*.go): add copyright notice
Merge pull request #206 from philips/fixup-copyright

chore(*.go): add copyright notice
feat(etcd_handlers): add the dashboard URL

/dashboard serves a dashboard now