Updated Wicket AJAX calls.

The format for Wicket AJAX calls has changed with version 6. I have
updated the library to use this new format.
Merge pull request #327 from cmiles74/master

Updated Wicket AJAX calls.
Update maven-gpg-plugin
Plugin version updates
Add pluginManagement for maven-source-plugin
Started work on OpenLayers3 examples.

I also fixed issues with the project POM files and altered some code to work with Java 1.6.
Added a simple map example.
Added a simple map example
Added the simple map page.
Added the simple map page
Added jrebel.xml to the ignore list.
Worked on the examples.
Completed first pass at Wicket 7 support.
Moved the OpenLayers3 README file
Removed unnecessary dependencies

Moving to the wicket-bootstrap 0.10.0 snapshot resolved these issues.
Removed dependency on java.awt.Color
Merged in changes from wicket-6.x branch
Minor fixes and code cleanup
Fixed bugs in the Color class.
Removed extra import.