Upgrade InMethod Grid to Wicket 6.0
Update the copyright year
Manually merged changes from 1.4 branch.
Options that should eveluate to function objects browser side should not
escape unicode characters like "=".
Also when the input component gets replaced through AJAX while it is
being incremented/decremented, avoid endless loop.
Remove jdk-1.5-parent directory again

There is no java 5 any more with wicket 6.  The jdk-1.5-parent directory came back by an incorrect merge.

This removes the code again.  It has already been moved into the jdk-1.6-parent folder.
[jdk-1.6-parent] remove datatable-autocomplete-parent from pom.xml

Removes the datatable-autocomplete-parent and related artifacts from the pom.xml which will remove some of the code that needs to be updated for upstream wicket 6 changes.
[inmethod-grid] Fix imports after WICKET-4439
[core] comment out modules that don't compile

In order to get a better sense of where the wicket 6 wicketstuff modules are I have commented out all of the projects that currently don't build.

Some of the changes required are more complicated than others but at least now we will have base that compiles.
[inmethod-grid] Update to upstream - JavaScriptPrecondition is removed
[annotations] Re-enable Annotations module
[scala] Re-enable scala-extensions module
[jquery] Re-enable jquery module
[html5] Re-enable wicket-html5
[spring-reference] Re-enable spring-reference module
[minis] Re-enable minis module
[jsr-303] Re-enable JSR303 module
[portlet] Re-enable portlet module
Add EventSourceResource - an IResource that knows the response protocol of Server Side Events
The response should be in UTF-8 by SSE specs
Re-enable tinymce module
Fix #79 - Tinymce icon images not showing on advanced Theme and wicket deployment mode