Add do_once macro
Feature

* Add BSettingsNode setDefaultValue and defaultValue methods
* Add BSettingsNode setUserGetFunction and userGetUnction methods
Export friend operators
Feature

* Add SslServer enum to BGenericServer
* Improve BGenericServer SSL connection handling
* Add SslHandlingMode enum to BNetworkServer
* Add setSslEncriptionWaitTimeout and sslEncriptionWaitTimeout methods to BNetworkServer
* Add setSslHandlingMode ande sslHandlingMode methods to BNetworkServer
* Handle SSL connections properly in BNetworkServer
Feature

* Add ability to handle BHelpBrowser links
* Add setUserUrlHandlerFunction and userUrlHandlerFunction methods to BHelpBrowser
Fix; feature

* Track stdin echo mode
* Add BTerminal::stdinEchoEnabled method
Feature

Add BApplicationBase::pluginWrapper and BPluginWrapper::pluginWrapper methods
Feature

Add setDockWidgetsAutoTabificationEnabled and tabifyDockWidgets functions to BGuiTools