When truncating a list of intervals, only keep intervals with end >
start.
Added function to filter list of intervals by distance from diagonal.
Removes all intervals that are closer to the diagonal than given value
epsilon.
Changed fields in ImageRegion to be public and final, so they can be
accessed elsewhere but can't be changed.
Added code for visualization applet (requires core.jar! from Processing)
added Processing library: core.jar
Added build script for homviz jar 
Removed sphere.txt example, small coordinates where causing trouble
Reverted changes to ImageRegion, no longer needed since classes that
needed access to package private fields have now moved to the same
package.
Reversed changes in BottleneckDistance (just spacing due to auto-save)
Merge pull request #1 from queenBNE/master

Processing based 3d pointcloud & persistence barcode/diagram visualization