Streamline the BufferedImage functionality in the compressor so that it works the...

Streamline the BufferedImage functionality in the compressor so that it works the same way as compressing a "normal" image, and deprecate the old BufferedImage methods and other redundant methods.  Eliminate the use of deprecated features in the test programs.

git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1168 632fc199-4ca6-4c93-a231-07263d6284db