Make the (temporary) UI more responsive
Skip values for offline sensors
Allow overwriting GPX/TCX files in development
Correct log message
Explore Travis CI unit test error

Appears to be related to [QTBUG-26161)[https://bugreports.qt-project.org/browse/QTBUG-26161]
Explore Travis CI unit test error
Explore Travis CI unit test error
Explore Travis CI unit test error
Explore Travis CI unit test error
Don't use deprecated QDateTime::setUtcOffset function
Restore the use of the QDateTime::setUtcOffset function

Even though the function is deprecated, we need it for Qt 5.0 on Travis
CI.  We'll wrap it in Qt-version macros later.
Use the (deprecated) QDateTime::utcOffset function for now
Handle UTC-offset bug on Qt 5.0 (and possibly 5.1?)
Add more Travis CI tests
Add more Travis CI diagnostics
Add more Travis CI diagnostics
Reduce QDateTime::addMSec bug test set
Add more QDateTime::addMSec diagnostics
Add even more diagnostics
Workaround QDateTime::addMSec bug for Qt 5.0