Added en empty search result page

By using the proper Eclipse extension point I've hooked our own
custom search result page into the search results view. The view
doesn't do anything and only contains "fake" implementations of the
methods necessary to make the compiler happy.

When we're able to execute queries and actually produce proper
search results we can finish the implementations.

This fixes #4
Merge pull request #11 from mads379/empty_search_result_panel

Added en empty search result page