grafx - Extensible Java Graphics Package Code

Starting to implement pause() and resume() in audio clips. This is going to be
very tricky.

Adding comments to ModernAudioClip.java. Getting ready to implement pause()
and resume(). It will be difficult.

Getting rid of most cases of java.applet.AudioClip usage. Moving the new audio
framework into package com.nerius.audio. This is a minor change which touches
many files.

Adding class com.nerius.game.newaudio.AudioClip. It's an interface.

Renaming m_lastPlay -> m_lastPlayMillis, timeNow -> timeNowMillis,
m_lastLoop -> m_lastLoopMillis in ModernAudioClip.

Renaming m_constrTime -> m_constrTimeMillis,
m_startedOff -> m_startedOffMillis. Adding m_clipLenMicros.

Implemented CommandLineArgs.queryFlagWithArg() but it's untested.

Skipping watermark by default in video generation.

Adding the beginnings of class CommandLineArgs, and using it successfully.

Adding class-level comment to Sampling2xImageConsumer.java.