Better error handling when APIs are down

[theclue]

Hi,

first of all tnx for this package; it's really a life-safing in our everyday reporting duties :)

I think that a better check should be added when the APIs are down (or at least I guess they are) and properly catch and retrown the exception.

But to be sure the problems are at remote site rather than on the R code, I think that this message should be better repacked.

just my two cents!

tnx allot,
gabriele