Improvements on error handling in forecastio and instagram nodes

[tedhuang]

Instagram:

• Added scope "public_content" required for liked photos
• Some checks for undefined

Forecastio:

• Added trim to lat, lon and apikey strings
• Error handling in JSON parse for when forecastio API returns bad request in html page

[knolleary]

Hi, thanks for raising this.

As described in our contribution guidelines, we need a signed contributor license agreement in place before we can merge a pull request.

Nick

[knolleary]

node-red-gitbot: please update CLA status check

[tedhuang]

Hi, I'm trying to get the tests to run with "istanbul cover grunt" as in the travis test but a lot of them are failing on nodes that haven't been touched in the commits. Is there anything special that I need to configure run to get the tests going? Thanks.