Adding mousewheel support to Java GUI components.

This commit adds support to the AWT and JOGL Java GUI components
for using the mousewheel to zoom in and out.

Change-Id: Ib3506af465b9f99ffd593e675e513693e54e410e
Fix java code formatting.

This commit changes java source files so that they all have a
consistent indentation (2 spaces).

Change-Id: Ic6c0df70ea442229fa0418ac34e3923447580739
Add java file to generated jar file.

This commit modifies the CMake build script so that the java file
rendering/vtkAbstractEventInterceptor.java is copied (when java
wrapping is enabled) into the generated jar file, which was missing
previously.

Change-Id: Ifd5456141c104c2cd40dc5170bddfe5d93f2e12b
Merge topic 'java-mousewheel' into master

14902f4c Add java file to generated jar file.
9d8b4ee7 Fix java code formatting.
4fc0088f Adding mousewheel support to Java GUI components.