No home page

Note: @pblain has said that he would like the results grid to initially display all results (i.e. as if doing a search with no facets).  I tried `searcher.search()` in the appropriate place but ran in to some *weird* problems.  The problematic code was in the code which is going to be deleted as part of https://github.com/aodn/aodn-portal/pull/439 - hence, I didn't bother to fix it.

The long and the short is that when this pull request and the other are merged to master, we will need to add in `searcher.search()` somewhere during initialisation.