com.lafros.juice.app 4.2

• TheMsgLine becomes MsgLine, now extending JComponent (making it GUI-builder friendly)
• IAppContext: setMsgLine(MsgLine), IExe.ITog getEnableSoundEffects() added
• IAppContext: methods returning an IExe which is an IExe.ITog now declare as much

• TheAbstractApp: destroy() now calls new appContext.resetAlerts(), resetCmds() methods, before setting instance to null; this will allow a web-page containing a JUICe applet to be reloaded (rather than the user having to close the window/tab, delete the class loader, then revisit the page); note that the limitation of one JUICe app per class loader still applies

• TheAbstractApp: destroy() now protected, rather than public
• TheAbstractApp: now waits for any existing instance to be destroy()ed (in applet case)
• TheAbstractApp: rootComponent removed (not actually used!)
• AppContext: theCmdsController now static, since may only be instantiated once
• OnlyInitIfAlertsPresent: theAlertsController now static, since may only be instantiated once