Add examples
new file:   ch26/item04/DoubleBuffer.java
new file:   ch26/item05/TrackedImageLoad.java
new file:   ch26/item05/leonardo.jpg
new file:   ch26/item05/matisse.jpg
new file:   ch26/item05/picasso.jpg
new file:   ch26/item05/renoir.jpg
new file:   ch26/item05/seurat.jpg
new file:   ch26/item05/vincent.jpg
new file:   ch26/item07/HistoGrab.java
new file:   ch26/item07/vermeer.jpg
Add examples
new file:   ch26/item08/Blur.java
new file:   ch26/item08/Contrast.java
new file:   ch26/item08/Convolver.java
new file:   ch26/item08/Grayscale.java
new file:   ch26/item08/ImageFilterDemo.java
new file:   ch26/item08/Invert.java
new file:   ch26/item08/LoadedImage.java
new file:   ch26/item08/PlugInFilter.java
new file:   ch26/item08/Sharpen.java
new file:   ch26/item08/TileImage.java
new file:   ch26/item08/picasso.jpg
new file:   ch26/item08/vincent.jpg
new file:   ch26/item09/Animation.java
new file:   ch26/item09/earth.gif
new file:   ch26/item09/earth.htm
new file:   ch26/item09/horse.gif
new file:   ch26/item09/horse.htm
Merge branch 'master' into description