Add travisci-to-blink1.sh to monitor travis-ci builds

This is a bash script I wrote to periodically poll a travis-ci repository and indicate its build status by color on a Blink(1): green for passing, red for failing, and yellow for build in progress. It works similarly to the existing gmail-to-blink1.sh--start it running and it will keep running and polling until it's killed. Tested on OS X and on a Raspberry Pi running Raspbian. Feedback is welcome, and I hope others find it useful!