Results 5 issues of Forrest Voight

When a program is compiled with `-gsplit-dwarf` (documented [here](https://gcc.gnu.org/wiki/DebugFission)), backward-cpp works normally, except that "inliners" (source locations that are in the logical stack trace, but don't correspond to physical program...

...a final state for the upcoming libmpq version"

This adds a getter corresponding to `HideNextItem()`. I needed this to be able to implement some custom auto-fitting behaviors.

Decrease stales (especially when using p2pool) by using a sliding window to allow fast long polling responses without potentially overloading the pool server.

Verified to match another hygrometer to within 1% RH and 3 °C. Here are some pictures if you're interested: http://u.forre.st/TEMPerHumM12V1.2/