Update copyright year to include 2019

Fix JDK8 javadoc lint errors

Issue 261 ; applying patch from jlessner@

Issue 260 ; applying patch from jlessner@

remove fullscreen test which interferes with window focus when running builds

updating maven plugin dependency versions and re-arranging reporting sections

refactoring jdk16 and jdk16-modules back into core and examples respectfully, additional fixes to extras package, enable OSX intel profile by default

Issue 235 - PSwingEventHandler now uses Point2D.Double in call to cameraToLocal to avoid under/overflow

- small javadoc change to fix javadoc warnings

Issue 217; adding/replacing license headers

Converting tabs to spaces in PSwingTest.

Issue 173; merged from branch; added @param and @since to PSwing.setUseBufferedPainting; added unit test to cover buffered painting branch in PSwing.

Issue 173; (merge from branch) Introduced useBufferedPainting option to PSwing. Used much of the original buffered painting implementation details from Piccolo2D 1.2. Also added PSwingExample4 which extends PSwingExample1 but turns on buffered painting for all of the PSwing nodes.

Issue 195 ; mock painting methods were missing logic in PSwing.paint(PPaintContext)

Issue 205 ; updating copyright year in license header to 2011

updating maven plugin and maven report plugin versions

Applied fixes from the piccolo 1.3 branch to trunk, see issue 163

Issue 37 ; refactoring package edu.umd.cs.piccolox to org.piccolo2d.extras in extras

Issue 37 ; refactoring package edu.umd.cs.piccolo to org.piccolo2d in core

Commenting out test that doesn't work under XVnc

Adding tests to ensure PSwing plays well with FEST. ...

Proves(?) Issue #33 can be closed.

Issue 177 ; adding additional unit tests and applying patch

Issue 177 ; adding unit test for selection notification on delete key event

Making checkstyle allow missing javadocs on getters. Leaving it up to the developer to decide if a javadoc is nessary.

Marking accessor for PNotificationCenter Singleton as synchronized. This one was caught by poster in http://code.google.com/p/piccolo2d/issues/detail?id=136#c4

Removing Deprecated code

Fixing Issue 136. PNotificationCenter is being made final so that subclasses can't create multiple instances of it

Changing constants to final as per Issue #135

Issue 163: restore component.revalidate call in constructor to get us back to state of PSwing r965

Issue 163: Removed infinite loop introduced in r978 by calling component.revalidate in PSwing.updateBounds. With the removal of HeirarchyBoundsListener in r978, this should put PSwing back to r965, the state it was in before we started working on this issue.