The build is failing on the github page.

yes, there is an issue for that. it's an issue with travis-ci and i have no solution at the moment :(

The refresh() is actually clearing the caching (doesn't do what exactly it says), it would be better to move (or re-organise) the correct logics e.g the code in getTaskdata into this function.

good argument. I will take to heart
oh, and thanks for the improvement suggestions