Switch build system from Maven to more Scala friendly SBT.

NetBeans and IDEA can directly load project configuration from SBT.
Remove IDEA project setup, it can be now loaded from SBT configuration.
Customize SBT REPL prompt to display project name.
Start transition to JavaCV 0.8.

Source structure is changed to standard SBT. Source files will be moved to the new location as they are updated to work with JavaCV 0.8.
Upgrade  first three chapters to JavaCV 0.8.
Convert to GitHub markdown format.
Use javacpp 0.8.1-SNAPSHOT to work around class loader bug #1

https://github.com/bytedeco/javacpp/issues/1
Make distinction between loading Mat and CvMat images.
Simple test for javacpp bug #1

https://github.com/bytedeco/javacpp/issues/1
Port tests to JavaCV 0.8.
Convert examples in chapter 4 to JavaCV 0.8.
Convert examples in chapter 5 to JavaCV 0.8.
Move chapter 6 to new source location.
Convert examples in chapter 6 to JavaCV 0.8.
 Move chapter 7 to the new source location.
Convert examples in chapter 7 to JavaCV 0.8.
Move chapter 8 to the new source location.
Restore SURF test.
Convert examples in chapter 8 to JavaCV 0.8.

https://github.com/bytedeco/javacpp-presets/issues/3
Move chapter 9 to the new source location.