cml-publish fails in folders not init by git

[DavidGOrtega]

as #478

Error: Command failed: git config --get remote.origin.url
    at checkExecSyncError (child_process.js:635:11)
    at execSync (child_process.js:671:15)
    at repo_from_origin (/iterative/cml/src/cml.js:15:18)
    at new CML (/iterative/cml/src/cml.js:63:47)
    at run (/iterative/cml/bin/cml-publish.js:28:15)
    at Object.<anonymous> (/iterative/cml/bin/cml-publish.js:86:1)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14) {
  status: 1,
  signal: null,
  output: [ null, <Buffer >, <Buffer > ],
  pid: 12360,
  stdout: <Buffer >,
  stderr: <Buffer >
}

[DavidGOrtega]

@casperdcl this is also related to #515 I had this in my agenda

[casperdcl]

OK thanks! You can put it on the CML weekly board whenever you're on it.

[0x2b3bfa0]

Closed with #519