SWIGJAVA: Remove the last JAVA ifdefs from src

Removed all references to #ifdef SWIGJAVA and JAVACALLBACK from the
library source.  All java-specific source code has been moved to the
corresponding library's .i file for java.

    * Update library source
    * Update examples where necessary
    * The function pointer methodology has been remove from libraries
      which provided callbacks as both a class and a function pointer
      implementation.  Examples were updated to use the class version
      of callbacks.
    * Updated documentation for SWIGJAVA

Signed-off-by: Noel Eck <noel.eck@intel.com>

examples/java/MMA7660Sample.java

@@ -44,13 +44,13 @@ public class MMA7660Sample
 
             while (true)
             {
-                float acceleration[] = accel.getAcceleration();
+                upm_mma7660.FloatVector acceleration = accel.getAcceleration();
                 System.out.println("Acceleration: x = "
-                                   + acceleration[0]
+                                   + acceleration.get(0)
                                    + " y = "
-                                   + acceleration[1]
+                                   + acceleration.get(1)
                                    + " x = "
-                                   + acceleration[2]);
+                                   + acceleration.get(2));
 
                 System.out.println();