modified:   README.md
merge
add timeout for transportation layer
change default heart beat to electionTimtout
change DefaultHeartbeat to DefaultElectionTimeout
	modified:   raft_server.go
	modified:   transporter_test.go
change heartbeattimeout to electiontimeout
gofmt
Merge pull request #152 from evan-gu/tranWithTimeout

Transporter with timeout
feat(etcd_handlers): enable CORS

When developing or using web frontends for etcd it will be necessary to
enable Cross-Origin Resource Sharing. Add a flag that lets the user
enable this feature via a whitelist.
Merge pull request #153 from philips/add-cors

feat(etcd_handlers): enable CORS
README: add justinsb/jetcd project
feat(README): add python library transitorykris/etcd-py
Blank prevValue in POST should be interpreted as a blank test-and-set, not a normal set
Merge pull request #159 from hayesgm/master

Blank prevValue should be TestAndSet with blank prevValue, not Set
Add another Java library for etcd

https://github.com/diwakergupta/jetcd
Merge pull request #160 from diwakergupta/patch-1

Add another Java library for etcd