CML v0.7.0

• Unify commands and centralize logging (#703)
• Docker: whitelist entrypoints (#726, #716)
• Allow negative --idle-timeout on cml-runner (#700)
• Readme: misc updates (#717, #684 <- #652)
• misc tensorboard-dev improvements (#673)
• Proxy support (#674)
• npm & test time updates (#707)
• Jest global timeout and fixes (#693)
• bump deps (#687, #686, #695 <- #691)