Merge pull request #84 from kdienes/cmake-patches

Cmake patches
Merge pull request #82 from kdienes/check-errors

Check errors explicitly; don't rely on assert().
Merge pull request #85 from kdienes/debian-packaging

Debian packaging
Avoid dividing by zero for zero sampleFreq.
Update to QT5.
Update to use system HIDAPI.
Zero bluetooth host address in case we don't find one
Bump version number.
include hidapi