Read SourceClear API token from config
Read SourceClear API token from config

If it's not empty, it defers to SRCCLR_API_TOKEN.

JuliaCI/travis-build,JuliaCI/travis-build,andyli/travis-build,kevmoo/travis-build,craigcitro/travis-build,andyli/travis-build,kevmoo/travis-build,craigcitro/travis-build