Moved pysolr dependency to a try/catch
Moved pysolr dependency to a try/catch

Blechhirn/TileStache,mpuig/TileStache,moskvax/TileStache,robpvn/Vector-Tile-Research,mpuig/TileStache,Billups/TileStache,Kosta-Github/TileStache,mapzen/TileStache,TileStache/TileStache,MetGIS/TileStache,Billups/TileStache,mapzen/TileStache,jbants/TileStache,Kosta-Github/TileStache,Billups/TileStache,robpvn/Vector-Tile-Research,Blechhirn/TileStache,MetGIS/TileStache,SEL-Columbia/TileStache,jbants/TileStache,moskvax/TileStache,robpvn/Vector-Tile-Research,jbants/TileStache,mapzen/TileStache,TileStache/TileStache,TileStache/TileStache,mojodna/TileStache,SEL-Columbia/TileStache,Blechhirn/TileStache,MetGIS/TileStache,moskvax/TileStache,SEL-Columbia/TileStache,mojodna/TileStache,Kosta-Github/TileStache