Deprecate Lucene

.. use a simple free text search against the ridecache now we
   have all the texts available and in memory

.. no need to maintain an index, no dependency on a horrid lib
   with nasty dependencies and its faster too

.. the free text search is very simple, will need to bolster it
   over time e.g. it matches text not words

src/HistogramWindow.cpp

@@ -99,7 +99,6 @@ HistogramWindow::HistogramWindow(Context *context, bool rangemode) : GcChartWind
 
     setChartLayout(vlayout);
 
-#ifdef GC_HAVE_LUCENE
     // search filter box
     isfiltered = false;
     searchBox = new SearchFilterBox(this, context);
@@ -112,7 +111,6 @@ HistogramWindow::HistogramWindow(Context *context, bool rangemode) : GcChartWind
     }
     HelpWhatsThis *searchHelp = new HelpWhatsThis(searchBox);
     searchBox->setWhatsThis(searchHelp->getWhatsThisText(HelpWhatsThis::SearchFilterBox));
-#endif
 
     // date selection
     dateSetting = new DateSettingsEdit(this);
@@ -977,11 +975,7 @@ HistogramWindow::updateChart()
 
                 // plotting a data series, so refresh the ridefilecache
 
-#ifdef GC_HAVE_LUCENE
                 source = new RideFileCache(context, use.from, use.to, isfiltered, files, rangemode);
-#else
-                source = new RideFileCache(context, use.from, use.to);
-#endif
                 cfrom = use.from;
                 cto = use.to;
                 stale = false;
@@ -1013,11 +1007,9 @@ HistogramWindow::updateChart()
                 }
 
                 FilterSet fs;
-#ifdef GC_HAVE_LUCENE
                 fs.addFilter(isfiltered, files);
                 fs.addFilter(context->isfiltered, context->filters);
                 fs.addFilter(context->ishomefiltered, context->homeFilters);
-#endif
 
                 // setData using the summary metrics -- always reset since filters may
                 // have changed, or perhaps the bin width...
@@ -1060,7 +1052,6 @@ HistogramWindow::updateChart()
     } // if stale
 }
 
-#ifdef GC_HAVE_LUCENE
 void 
 HistogramWindow::clearFilter()
 {
@@ -1080,7 +1071,6 @@ HistogramWindow::setFilter(QStringList list)
     updateChart();
     repaint();
 }
-#endif
 
 double
 HistogramWindow::getDelta()