[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 242 ; fix typo in API documentation

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

Issue 207 ; ignore mouse pressed and released events with button MouseEvent.NOBUTTON instead of throwing an exception

Issue 236 ; adding zoom event handler that responds to mouse wheel events

Issue 231 ; doc fix, width --> height

Issue 227; (trunk) fixed bounds issue when replacing PCamera on a PCanvas; added relevant tests

updating maven javadoc plugin version to 2.8

Issue 217; adding/replacing license headers

Issue 205 ; updating copyright year in license header to 2011

updating maven plugin and maven report plugin versions

Issue 185 ; applying patch issue185fix.patch

Issue 180 ; rolling back r1008 to r1006

Issue 185 ; applying patch from atdixon with minor changes, list of activities is cleared after activities are processed

Issue 37 ; various cleanup related to org.piccolo2d package refactoring

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

Issue 172 ; increasing test coverage, javadoc improvements, checkstyle fixes

Fixing Issue 172

Making PNode.print() throw PrinterException rather than swallowing it. ...

This is until we remove printing support from PNode as per Issue 102.

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

Adding Deep Copy Test to PNode.clone()

Removing dead class since all methods that invoked it were deprecated and so have been deleted.

Removing unnecessary local variables from validateFullBounds.

Removing Deprecated code

Deleting PUtilTest since it no longer had any tests

Changing constants to final as per Issue #135

updating version to 2.0-SNAPSHOT

updating version to 1.3