etcd: set minimum TLS version to 1.0 (disable SSL3)
Merge pull request #970 from jonboulle/tls

etcd: set minimum TLS version to 1.0 (disable SSL3)
docs: clarify bidirectional MachineOf requirements are unfulfillable
Merge pull request #976 from jonboulle/machineof

docs: clarify bidirectional MachineOf requirements are unfulfillable
*: add license header to all source files
Merge pull request #980 from jonboulle/license

*: add license header to all source files
doc: tweak API doc

- clean up style of headers, response codes, request formats
- move reference info (pagination, errors, etc) to end of doc