[maven-release-plugin] prepare for next development iteration

[maven-release-plugin] prepare release piccolo2d-complete-2.0-rc1

Issue 251 ; merge build-related changes from release-1.3 branch to trunk

updating maven javadoc plugin dependency version to 2.9

Issue 229 ; update maven-checkstyle-plugin dependency version to 2.9

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

updating maven javadoc plugin version to 2.8

- 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 ; various cleanup related to org.piccolo2d package refactoring

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

updating version to 2.0-SNAPSHOT

updating version to 1.3