The fullscreen plugin was copied source-for-source from https://github.com/bandlem/Fullscreen/ under the Eclipse Public License.
In revision 1229632 the source code was modified to indicate that it was released under the Apache License. This is not the case.
Please remove the Apache License from these files as I do not give permission for these to be relicensed without prior consultation.
The PLUGIN_ID in the Activator also needs to be renamed if you are doing this wholesale to avoid problems where the real plugin may be available.