* prepared for login/off sounds
* prepared for text message sounds
* helper method to play sounds
* enabled mute / mixer also in cockpit, including context menus
* settings for notification sounds
* some minor tweaks, e.g. changed signal/slot to C++ style where missing
* added methods to get results in context
* added signal to indicate audio test completed
* updated GUI to display results
* changed test run methods to non-const to be consistent with voice lib
* Logic in GUI to avoid parallel / interfering tests
* Fixed wrong Q_ASSERT message and QTimer::singleShot in voice_vatlib.cpp
Some minor changes in the same step:
* Fixed some style sheets
* Added QToolBox as preparation for a status message list
* Renamed voice settings to audio settings
to send either single or multiple messages as required.
Along with the changes fixed some places where not all status
messages had been sent.
MainWindow connected with both signals (statusMessage, statusMessages)
Recreated DBus XML file
Changed back signal/slot connection to old style
The described problem is one of the disadvantages of the new style,
when it comes to default values or different signatures
Also using a minimum value and adjusting the slider to any set value.
* rename CStatusMessages to CStatusMessageList
* rename NetworkVatlib to CNetworkVatlib
* replace all occurrences of Realname with RealName (correct camel case)
* CSequence method corresponding to CList::append is push_back
* don't compile the qdbuscpp2xml metadata plugin by default
* CAircraftIcao string members always trimmed and capitalized
* added CComSystem::roundTo25KHz
* using epsilon comparison in a couple of places
refs #81
