New tests for reading/writing bitmaps.

2006-03-22  Lillian Angel  <langel@redhat.com>

        * gnu/testlet/javax/imageio/ImageIO/Bitmap-16Bit.bmp:
        Added bitmap for test.
        * gnu/testlet/javax/imageio/ImageIO/Bitmap-1Bit.bmp:
        Added bitmap for test.
        * gnu/testlet/javax/imageio/ImageIO/Bitmap-24Bit.bmp:
        Added bitmap for test.
        * gnu/testlet/javax/imageio/ImageIO/Bitmap-32Bit.bmp:
        Added bitmap for test.
        * gnu/testlet/javax/imageio/ImageIO/Bitmap-4Bit.bmp:
        Added bitmap for test.
        * gnu/testlet/javax/imageio/ImageIO/Bitmap-8Bit.bmp:
        Added bitmap for test.
        * gnu/testlet/javax/imageio/ImageIO/Bitmap-RLE4.bmp:
        Added bitmap for test.
        * gnu/testlet/javax/imageio/ImageIO/Bitmap-RLE8.bmp:
        Added bitmap for test.
        * gnu/testlet/javax/imageio/ImageIO/outputBitmap.bmp:
        Added bitmap for test.
        * gnu/testlet/javax/imageio/ImageIO/ImageIOTest.java:
        (test): Moved tests to testStringData. Added calls to
        testReadWrite and testStringData.
        (testStringData): New function.
        (testReadWrite): Checks reading and writing of bitmap
        images. Compares images to verify they are the same.
        (checkPixels): Helper used to compare pixels of two
        images.