NCAR / manage_externals / 75

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travis-ci

Update screen output.

Update the screen output for status and checkout to indicate externals instead
of components. During checkout step, change text from 'checkout' to action verb
'checking out'.

Testing:
  make test - pass with one skip, python2/3
  manual testing - clm python2 - ok

558 of 618 branches covered (90.29%)

Branch coverage included in aggregate %.

1852 of 1960 relevant lines covered (94.49%)

2.36 hits per line